31912071017 has 2 divisors, whose sum is σ = 31912071018. Its totient is φ = 31912071016.

The previous prime is 31912071013. The next prime is 31912071083. The reversal of 31912071017 is 71017021913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30423731776 + 1488339241 = 174424^2 + 38579^2 .

It is a cyclic number.

It is not a de Polignac number, because 31912071017 - 2² = 31912071013 is a prime.

It is not a weakly prime, because it can be changed into another prime (31912071011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15956035508 + 15956035509.

It is an arithmetic number, because the mean of its divisors is an integer number (15956035509).

Almost surely, 2^31912071017 is an apocalyptic number.

It is an amenable number.

31912071017 is a deficient number, since it is larger than the sum of its proper divisors (1).

31912071017 is an equidigital number, since it uses as much as digits as its factorization.

31912071017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 32.

The spelling of 31912071017 in words is "thirty-one billion, nine hundred twelve million, seventy-one thousand, seventeen".