97531513 has 2 divisors, whose sum is σ = 97531514. Its totient is φ = 97531512.

The previous prime is 97531471. The next prime is 97531529. The reversal of 97531513 is 31513579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96294969 + 1236544 = 9813^2 + 1112^2 .

It is an emirp because it is prime and its reverse (31513579) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97531513 is a prime.

It is not a weakly prime, because it can be changed into another prime (97531613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48765756 + 48765757.

It is an arithmetic number, because the mean of its divisors is an integer number (48765757).

Almost surely, 2^97531513 is an apocalyptic number.

It is an amenable number.

97531513 is a deficient number, since it is larger than the sum of its proper divisors (1).

97531513 is an equidigital number, since it uses as much as digits as its factorization.

97531513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14175, while the sum is 34.

The square root of 97531513 is about 9875.8044229318. The cubic root of 97531513 is about 460.3077855085.

The spelling of 97531513 in words is "ninety-seven million, five hundred thirty-one thousand, five hundred thirteen".