31079891111 has 2 divisors, whose sum is σ = 31079891112. Its totient is φ = 31079891110.

The previous prime is 31079891081. The next prime is 31079891119. The reversal of 31079891111 is 11119897013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31079891111 - 2⁶ = 31079891047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31079891119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15539945555 + 15539945556.

It is an arithmetic number, because the mean of its divisors is an integer number (15539945556).

Almost surely, 2^31079891111 is an apocalyptic number.

31079891111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31079891111 is an equidigital number, since it uses as much as digits as its factorization.

31079891111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 41.

The spelling of 31079891111 in words is "thirty-one billion, seventy-nine million, eight hundred ninety-one thousand, one hundred eleven".