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69380631 = 35285517
BaseRepresentation
bin1000010001010…
…10101000010111
311211112220100000
410020222220113
5120230140011
610515022343
71501503615
oct410525027
9154486300
1069380631
1136188771
121b29a9b3
13114b2938
1493006b5
156157356
hex422aa17

69380631 has 12 divisors (see below), whose sum is σ = 103928552. Its totient is φ = 46253592.

The previous prime is 69380617. The next prime is 69380639. The reversal of 69380631 is 13608396.

It is a happy number.

It is not a de Polignac number, because 69380631 - 26 = 69380567 is a prime.

It is a super-2 number, since 2×693806312 = 9627343915916322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69380639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142516 + ... + 143001.

Almost surely, 269380631 is an apocalyptic number.

69380631 is a deficient number, since it is larger than the sum of its proper divisors (34547921).

69380631 is an equidigital number, since it uses as much as digits as its factorization.

69380631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285532 (or 285520 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 69380631 is about 8329.5036466767. The cubic root of 69380631 is about 410.9094051479.

The spelling of 69380631 in words is "sixty-nine million, three hundred eighty thousand, six hundred thirty-one".

Divisors: 1 3 9 27 81 243 285517 856551 2569653 7708959 23126877 69380631