97953248521 has 2 divisors, whose sum is σ = 97953248522. Its totient is φ = 97953248520.

The previous prime is 97953248507. The next prime is 97953248563. The reversal of 97953248521 is 12584235979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86062436496 + 11890812025 = 293364^2 + 109045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97953248521 is a prime.

It is not a weakly prime, because it can be changed into another prime (97953248501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48976624260 + 48976624261.

It is an arithmetic number, because the mean of its divisors is an integer number (48976624261).

Almost surely, 2^97953248521 is an apocalyptic number.

It is an amenable number.

97953248521 is a deficient number, since it is larger than the sum of its proper divisors (1).

97953248521 is an equidigital number, since it uses as much as digits as its factorization.

97953248521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 55.

The spelling of 97953248521 in words is "ninety-seven billion, nine hundred fifty-three million, two hundred forty-eight thousand, five hundred twenty-one".