31812374689 has 2 divisors, whose sum is σ = 31812374690. Its totient is φ = 31812374688.

The previous prime is 31812374651. The next prime is 31812374717. The reversal of 31812374689 is 98647321813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31548864400 + 263510289 = 177620^2 + 16233^2 .

It is a cyclic number.

It is not a de Polignac number, because 31812374689 - 2³³ = 23222440097 is a prime.

It is not a weakly prime, because it can be changed into another prime (31812374389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15906187344 + 15906187345.

It is an arithmetic number, because the mean of its divisors is an integer number (15906187345).

Almost surely, 2^31812374689 is an apocalyptic number.

It is an amenable number.

31812374689 is a deficient number, since it is larger than the sum of its proper divisors (1).

31812374689 is an equidigital number, since it uses as much as digits as its factorization.

31812374689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The spelling of 31812374689 in words is "thirty-one billion, eight hundred twelve million, three hundred seventy-four thousand, six hundred eighty-nine".