31908968792087 has 2 divisors, whose sum is σ = 31908968792088. Its totient is φ = 31908968792086.

The previous prime is 31908968791943. The next prime is 31908968792153. The reversal of 31908968792087 is 78029786980913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31908968792087 - 2⁸ = 31908968791831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31908968791999 and 31908968792017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31908968792887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15954484396043 + 15954484396044.

It is an arithmetic number, because the mean of its divisors is an integer number (15954484396044).

Almost surely, 2^{31908968792087} is an apocalyptic number.

31908968792087 is a deficient number, since it is larger than the sum of its proper divisors (1).

31908968792087 is an equidigital number, since it uses as much as digits as its factorization.

31908968792087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 658409472, while the sum is 77.

The spelling of 31908968792087 in words is "thirty-one trillion, nine hundred eight billion, nine hundred sixty-eight million, seven hundred ninety-two thousand, eighty-seven".