31013497687 has 2 divisors, whose sum is σ = 31013497688. Its totient is φ = 31013497686.

The previous prime is 31013497661. The next prime is 31013497703. The reversal of 31013497687 is 78679431013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31013497687 - 2¹⁵ = 31013464919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31013497687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31013491687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506748843 + 15506748844.

It is an arithmetic number, because the mean of its divisors is an integer number (15506748844).

Almost surely, 2^31013497687 is an apocalyptic number.

31013497687 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013497687 is an equidigital number, since it uses as much as digits as its factorization.

31013497687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 31013497687 in words is "thirty-one billion, thirteen million, four hundred ninety-seven thousand, six hundred eighty-seven".