31347072937 has 2 divisors, whose sum is σ = 31347072938. Its totient is φ = 31347072936.

The previous prime is 31347072893. The next prime is 31347072961. The reversal of 31347072937 is 73927074313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22795262361 + 8551810576 = 150981^2 + 92476^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31347072937 is a prime.

It is not a weakly prime, because it can be changed into another prime (31347073937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15673536468 + 15673536469.

It is an arithmetic number, because the mean of its divisors is an integer number (15673536469).

Almost surely, 2^31347072937 is an apocalyptic number.

It is an amenable number.

31347072937 is a deficient number, since it is larger than the sum of its proper divisors (1).

31347072937 is an equidigital number, since it uses as much as digits as its factorization.

31347072937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792, while the sum is 46.

The spelling of 31347072937 in words is "thirty-one billion, three hundred forty-seven million, seventy-two thousand, nine hundred thirty-seven".