97521605 has 12 divisors (see below), whose sum is σ = 124316580. Its totient is φ = 73426944.

The previous prime is 97521583. The next prime is 97521607. The reversal of 97521605 is 50612579.

It can be written as a sum of positive squares in 6 ways, for example, as 1442401 + 96079204 = 1201^2 + 9802^2 .

It is not a de Polignac number, because 97521605 - 2²⁰ = 96473029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97521607) 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 11 ways as a sum of consecutive naturals, for example, 32300 + ... + 35189.

It is an arithmetic number, because the mean of its divisors is an integer number (10359715).

Almost surely, 2^97521605 is an apocalyptic number.

It is an amenable number.

97521605 is a deficient number, since it is larger than the sum of its proper divisors (26794975).

97521605 is a wasteful number, since it uses less digits than its factorization.

97521605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67528 (or 67511 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 97521605 is about 9875.3027801683. The cubic root of 97521605 is about 460.2921977808.

The spelling of 97521605 in words is "ninety-seven million, five hundred twenty-one thousand, six hundred five".