31707745369 has 2 divisors, whose sum is σ = 31707745370. Its totient is φ = 31707745368.

The previous prime is 31707745343. The next prime is 31707745397. The reversal of 31707745369 is 96354770713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26728326144 + 4979419225 = 163488^2 + 70565^2 .

It is a cyclic number.

It is not a de Polignac number, because 31707745369 - 2⁹ = 31707744857 is a prime.

It is a super-2 number, since 2×31707745369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31707745309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15853872684 + 15853872685.

It is an arithmetic number, because the mean of its divisors is an integer number (15853872685).

Almost surely, 2^31707745369 is an apocalyptic number.

It is an amenable number.

31707745369 is a deficient number, since it is larger than the sum of its proper divisors (1).

31707745369 is an equidigital number, since it uses as much as digits as its factorization.

31707745369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3333960, while the sum is 52.

The spelling of 31707745369 in words is "thirty-one billion, seven hundred seven million, seven hundred forty-five thousand, three hundred sixty-nine".