97097631157 has 2 divisors, whose sum is σ = 97097631158. Its totient is φ = 97097631156.

The previous prime is 97097631149. The next prime is 97097631161. The reversal of 97097631157 is 75113679079.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81911012401 + 15186618756 = 286201^2 + 123234^2 .

It is an emirp because it is prime and its reverse (75113679079) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97097631157 - 2³ = 97097631149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97097631098 and 97097631107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97097631557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48548815578 + 48548815579.

It is an arithmetic number, because the mean of its divisors is an integer number (48548815579).

Almost surely, 2^97097631157 is an apocalyptic number.

It is an amenable number.

97097631157 is a deficient number, since it is larger than the sum of its proper divisors (1).

97097631157 is an equidigital number, since it uses as much as digits as its factorization.

97097631157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2500470, while the sum is 55.

The spelling of 97097631157 in words is "ninety-seven billion, ninety-seven million, six hundred thirty-one thousand, one hundred fifty-seven".