97881697 has 2 divisors, whose sum is σ = 97881698. Its totient is φ = 97881696.

The previous prime is 97881689. The next prime is 97881701. The reversal of 97881697 is 79618879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58430736 + 39450961 = 7644^2 + 6281^2 .

It is a cyclic number.

It is not a de Polignac number, because 97881697 - 2³ = 97881689 is a prime.

It is not a weakly prime, because it can be changed into another prime (97881397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48940848 + 48940849.

It is an arithmetic number, because the mean of its divisors is an integer number (48940849).

Almost surely, 2^97881697 is an apocalyptic number.

It is an amenable number.

97881697 is a deficient number, since it is larger than the sum of its proper divisors (1).

97881697 is an equidigital number, since it uses as much as digits as its factorization.

97881697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 55.

The square root of 97881697 is about 9893.5179284216. The cubic root of 97881697 is about 460.8580346250.

The spelling of 97881697 in words is "ninety-seven million, eight hundred eighty-one thousand, six hundred ninety-seven".