97521636 has 24 divisors (see below), whose sum is σ = 229762624. Its totient is φ = 32191200.

The previous prime is 97521617. The next prime is 97521637. The reversal of 97521636 is 63612579.

It is a junction number, because it is equal to n+sod(n) for n = 97521594 and 97521603.

It is not an unprimeable number, because it can be changed into a prime (97521637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38215 + ... + 40686.

Almost surely, 2^97521636 is an apocalyptic number.

It is an amenable number.

97521636 is an abundant number, since it is smaller than the sum of its proper divisors (132240988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97521636 is a wasteful number, since it uses less digits than its factorization.

97521636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79011 (or 79009 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 97521636 is about 9875.3043497403. The cubic root of 97521636 is about 460.2922465531.

The spelling of 97521636 in words is "ninety-seven million, five hundred twenty-one thousand, six hundred thirty-six".