31868000789 has 2 divisors, whose sum is σ = 31868000790. Its totient is φ = 31868000788.

The previous prime is 31868000761. The next prime is 31868000809. The reversal of 31868000789 is 98700086813.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31669049764 + 198951025 = 177958^2 + 14105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31868000789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31868000719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15934000394 + 15934000395.

It is an arithmetic number, because the mean of its divisors is an integer number (15934000395).

Almost surely, 2^31868000789 is an apocalyptic number.

It is an amenable number.

31868000789 is a deficient number, since it is larger than the sum of its proper divisors (1).

31868000789 is an equidigital number, since it uses as much as digits as its factorization.

31868000789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 31868000789 in words is "thirty-one billion, eight hundred sixty-eight million, seven hundred eighty-nine", and thus it is an aban number.