97531613 has 2 divisors, whose sum is σ = 97531614. Its totient is φ = 97531612.

The previous prime is 97531589. The next prime is 97531633. The reversal of 97531613 is 31613579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96393124 + 1138489 = 9818^2 + 1067^2 .

It is an emirp because it is prime and its reverse (31613579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97531613 - 2²⁴ = 80754397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97531633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48765806 + 48765807.

It is an arithmetic number, because the mean of its divisors is an integer number (48765807).

Almost surely, 2^97531613 is an apocalyptic number.

It is an amenable number.

97531613 is a deficient number, since it is larger than the sum of its proper divisors (1).

97531613 is an equidigital number, since it uses as much as digits as its factorization.

97531613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 35.

The square root of 97531613 is about 9875.8094858093. The cubic root of 97531613 is about 460.3079428278.

The spelling of 97531613 in words is "ninety-seven million, five hundred thirty-one thousand, six hundred thirteen".