97155609097 has 2 divisors, whose sum is σ = 97155609098. Its totient is φ = 97155609096.

The previous prime is 97155609077. The next prime is 97155609107. The reversal of 97155609097 is 79090655179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69356382736 + 27799226361 = 263356^2 + 166731^2 .

It is a cyclic number.

It is not a de Polignac number, because 97155609097 - 2¹¹ = 97155607049 is a prime.

It is not a weakly prime, because it can be changed into another prime (97155609017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48577804548 + 48577804549.

It is an arithmetic number, because the mean of its divisors is an integer number (48577804549).

Almost surely, 2^97155609097 is an apocalyptic number.

It is an amenable number.

97155609097 is a deficient number, since it is larger than the sum of its proper divisors (1).

97155609097 is an equidigital number, since it uses as much as digits as its factorization.

97155609097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5358150, while the sum is 58.

The spelling of 97155609097 in words is "ninety-seven billion, one hundred fifty-five million, six hundred nine thousand, ninety-seven".