97659521 has 2 divisors, whose sum is σ = 97659522. Its totient is φ = 97659520.

The previous prime is 97659511. The next prime is 97659533. The reversal of 97659521 is 12595679.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63600625 + 34058896 = 7975^2 + 5836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97659521 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (97659511) 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 as a sum of consecutive naturals, namely, 48829760 + 48829761.

It is an arithmetic number, because the mean of its divisors is an integer number (48829761).

Almost surely, 2^97659521 is an apocalyptic number.

It is an amenable number.

97659521 is a deficient number, since it is larger than the sum of its proper divisors (1).

97659521 is an equidigital number, since it uses as much as digits as its factorization.

97659521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 44.

The square root of 97659521 is about 9882.2831876040. The cubic root of 97659521 is about 460.5090788052.

The spelling of 97659521 in words is "ninety-seven million, six hundred fifty-nine thousand, five hundred twenty-one".