31712570839 has 2 divisors, whose sum is σ = 31712570840. Its totient is φ = 31712570838.

The previous prime is 31712570779. The next prime is 31712570887. The reversal of 31712570839 is 93807521713.

It is a strong prime.

It is an emirp because it is prime and its reverse (93807521713) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31712570839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31712570639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15856285419 + 15856285420.

It is an arithmetic number, because the mean of its divisors is an integer number (15856285420).

Almost surely, 2^31712570839 is an apocalyptic number.

31712570839 is a deficient number, since it is larger than the sum of its proper divisors (1).

31712570839 is an equidigital number, since it uses as much as digits as its factorization.

31712570839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 31712570839 in words is "thirty-one billion, seven hundred twelve million, five hundred seventy thousand, eight hundred thirty-nine".