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107391769 = 4322412
BaseRepresentation
bin1100110011010…
…10101100011001
321111002001210221
412121222230121
5204443014034
614353440041
72442546352
oct631525431
9244061727
10107391769
1155690031
122bb70021
1319331134
1410396d29
159664bb4
hex666ab19

107391769 has 9 divisors (see below), whose sum is σ = 110405439. Its totient is φ = 104459040.

The previous prime is 107391763. The next prime is 107391799. The reversal of 107391769 is 967193701.

107391769 = T142 + T143 + ... + T864.

The square root of 107391769 is 10363.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 80766169 + 26625600 = 8987^2 + 5160^2 .

It is not a de Polignac number, because 107391769 - 211 = 107389721 is a prime.

It is a super-2 number, since 2×1073917692 = 23065984097898722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (107391763) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 445489 + ... + 445729.

It is an arithmetic number, because the mean of its divisors is an integer number (12267271).

Almost surely, 2107391769 is an apocalyptic number.

107391769 is the 10363-rd square number.

107391769 is the 5182-nd centered octagonal number.

It is an amenable number.

107391769 is a deficient number, since it is larger than the sum of its proper divisors (3013670).

107391769 is an frugal number, since it uses more digits than its factorization.

107391769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 43.

The cubic root of 107391769 is about 475.3246445492.

It can be divided in two parts, 107 and 391769, that added together give a square (391876 = 6262).

The spelling of 107391769 in words is "one hundred seven million, three hundred ninety-one thousand, seven hundred sixty-nine".

Divisors: 1 43 241 1849 10363 58081 445609 2497483 107391769