31179708971 has 2 divisors, whose sum is σ = 31179708972. Its totient is φ = 31179708970.

The previous prime is 31179708919. The next prime is 31179709007. The reversal of 31179708971 is 17980797113.

It is a strong prime.

It is an emirp because it is prime and its reverse (17980797113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31179708971 - 2¹⁸ = 31179446827 is a prime.

It is not a weakly prime, because it can be changed into another prime (31179728971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15589854485 + 15589854486.

It is an arithmetic number, because the mean of its divisors is an integer number (15589854486).

Almost surely, 2^31179708971 is an apocalyptic number.

31179708971 is a deficient number, since it is larger than the sum of its proper divisors (1).

31179708971 is an equidigital number, since it uses as much as digits as its factorization.

31179708971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792, while the sum is 53.

The spelling of 31179708971 in words is "thirty-one billion, one hundred seventy-nine million, seven hundred eight thousand, nine hundred seventy-one".