97520643 has 12 divisors (see below), whose sum is σ = 153669048. Its totient is φ = 59103360.

The previous prime is 97520623. The next prime is 97520669. The reversal of 97520643 is 34602579.

97520643 is a `hidden beast` number, since 9 + 7 + 5 + 2 + 0 + 643 = 666.

It is not a de Polignac number, because 97520643 - 2¹² = 97516547 is a prime.

It is a super-2 number, since 2×97520643² = 19020551622266898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 97520598 and 97520607.

It is not an unprimeable number, because it can be changed into a prime (97520623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 492430 + ... + 492627.

It is an arithmetic number, because the mean of its divisors is an integer number (12805754).

Almost surely, 2^97520643 is an apocalyptic number.

97520643 is a deficient number, since it is larger than the sum of its proper divisors (56148405).

97520643 is a wasteful number, since it uses less digits than its factorization.

97520643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985074 (or 985071 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 97520643 is about 9875.2540726809. The cubic root of 97520643 is about 460.2906842614.

The spelling of 97520643 in words is "ninety-seven million, five hundred twenty thousand, six hundred forty-three".