31807268789 has 2 divisors, whose sum is σ = 31807268790. Its totient is φ = 31807268788.

The previous prime is 31807268743. The next prime is 31807268807. The reversal of 31807268789 is 98786270813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29961879025 + 1845389764 = 173095^2 + 42958^2 .

It is an emirp because it is prime and its reverse (98786270813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31807268789 - 2⁸ = 31807268533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31807268989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15903634394 + 15903634395.

It is an arithmetic number, because the mean of its divisors is an integer number (15903634395).

Almost surely, 2^31807268789 is an apocalyptic number.

It is an amenable number.

31807268789 is a deficient number, since it is larger than the sum of its proper divisors (1).

31807268789 is an equidigital number, since it uses as much as digits as its factorization.

31807268789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 59.

The spelling of 31807268789 in words is "thirty-one billion, eight hundred seven million, two hundred sixty-eight thousand, seven hundred eighty-nine".