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97969145 = 531220389
BaseRepresentation
bin1011101011011…
…10001111111001
320211100100101212
411311232033321
5200040003040
613415452505
72266503221
oct565561771
9224310355
1097969145
115033473a
1228987135
13173b2311
14d023081
158902d65
hex5d6e3f9

97969145 has 12 divisors (see below), whose sum is σ = 121483620. Its totient is φ = 75843360.

The previous prime is 97969117. The next prime is 97969211. The reversal of 97969145 is 54196979.

It can be written as a sum of positive squares in 2 ways, for example, as 69538921 + 28430224 = 8339^2 + 5332^2 .

It is not a de Polignac number, because 97969145 - 220 = 96920569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97969093 and 97969102.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5390 + ... + 14999.

It is an arithmetic number, because the mean of its divisors is an integer number (10123635).

Almost surely, 297969145 is an apocalyptic number.

It is an amenable number.

97969145 is a deficient number, since it is larger than the sum of its proper divisors (23514475).

97969145 is a wasteful number, since it uses less digits than its factorization.

97969145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20456 (or 20425 counting only the distinct ones).

The product of its digits is 612360, while the sum is 50.

The square root of 97969145 is about 9897.9364010889. The cubic root of 97969145 is about 460.9952380685.

The spelling of 97969145 in words is "ninety-seven million, nine hundred sixty-nine thousand, one hundred forty-five".

Divisors: 1 5 31 155 961 4805 20389 101945 632059 3160295 19593829 97969145