31947002713 has 2 divisors, whose sum is σ = 31947002714. Its totient is φ = 31947002712.

The previous prime is 31947002687. The next prime is 31947002771. The reversal of 31947002713 is 31720074913.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31815143424 + 131859289 = 178368^2 + 11483^2 .

It is a cyclic number.

It is not a de Polignac number, because 31947002713 - 2³³ = 23357068121 is a prime.

It is a super-2 number, since 2×31947002713² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31947042713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15973501356 + 15973501357.

It is an arithmetic number, because the mean of its divisors is an integer number (15973501357).

Almost surely, 2^31947002713 is an apocalyptic number.

It is an amenable number.

31947002713 is a deficient number, since it is larger than the sum of its proper divisors (1).

31947002713 is an equidigital number, since it uses as much as digits as its factorization.

31947002713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The spelling of 31947002713 in words is "thirty-one billion, nine hundred forty-seven million, two thousand, seven hundred thirteen".