31912070919779 has 2 divisors, whose sum is σ = 31912070919780. Its totient is φ = 31912070919778.

The previous prime is 31912070919761. The next prime is 31912070919881. The reversal of 31912070919779 is 97791907021913.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31912070919779 - 2¹⁶ = 31912070854243 is a prime.

It is a super-2 number, since 2×31912070919779² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31912070919479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15956035459889 + 15956035459890.

It is an arithmetic number, because the mean of its divisors is an integer number (15956035459890).

Almost surely, 2^{31912070919779} is an apocalyptic number.

31912070919779 is a deficient number, since it is larger than the sum of its proper divisors (1).

31912070919779 is an equidigital number, since it uses as much as digits as its factorization.

31912070919779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13502538, while the sum is 65.

The spelling of 31912070919779 in words is "thirty-one trillion, nine hundred twelve billion, seventy million, nine hundred nineteen thousand, seven hundred seventy-nine".