97086172861 has 2 divisors, whose sum is σ = 97086172862. Its totient is φ = 97086172860.

The previous prime is 97086172819. The next prime is 97086172879. The reversal of 97086172861 is 16827168079.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71227603225 + 25858569636 = 266885^2 + 160806^2 .

It is a cyclic number.

It is not a de Polignac number, because 97086172861 - 2⁹ = 97086172349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97089172861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48543086430 + 48543086431.

It is an arithmetic number, because the mean of its divisors is an integer number (48543086431).

Almost surely, 2^97086172861 is an apocalyptic number.

It is an amenable number.

97086172861 is a deficient number, since it is larger than the sum of its proper divisors (1).

97086172861 is an equidigital number, since it uses as much as digits as its factorization.

97086172861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The spelling of 97086172861 in words is "ninety-seven billion, eighty-six million, one hundred seventy-two thousand, eight hundred sixty-one".