31860786697 has 2 divisors, whose sum is σ = 31860786698. Its totient is φ = 31860786696.

The previous prime is 31860786653. The next prime is 31860786757. The reversal of 31860786697 is 79668706813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28024099216 + 3836687481 = 167404^2 + 61941^2 .

It is a cyclic number.

It is not a de Polignac number, because 31860786697 - 2¹¹ = 31860784649 is a prime.

It is not a weakly prime, because it can be changed into another prime (31860286697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15930393348 + 15930393349.

It is an arithmetic number, because the mean of its divisors is an integer number (15930393349).

Almost surely, 2^31860786697 is an apocalyptic number.

It is an amenable number.

31860786697 is a deficient number, since it is larger than the sum of its proper divisors (1).

31860786697 is an equidigital number, since it uses as much as digits as its factorization.

31860786697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 31860786697 in words is "thirty-one billion, eight hundred sixty million, seven hundred eighty-six thousand, six hundred ninety-seven".