31310429977 has 2 divisors, whose sum is σ = 31310429978. Its totient is φ = 31310429976.

The previous prime is 31310429903. The next prime is 31310430007. The reversal of 31310429977 is 77992401313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22677046921 + 8633383056 = 150589^2 + 92916^2 .

It is a cyclic number.

It is not a de Polignac number, because 31310429977 - 2¹⁹ = 31309905689 is a prime.

It is not a weakly prime, because it can be changed into another prime (31310429077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655214988 + 15655214989.

It is an arithmetic number, because the mean of its divisors is an integer number (15655214989).

Almost surely, 2^31310429977 is an apocalyptic number.

It is an amenable number.

31310429977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31310429977 is an equidigital number, since it uses as much as digits as its factorization.

31310429977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 46.

The spelling of 31310429977 in words is "thirty-one billion, three hundred ten million, four hundred twenty-nine thousand, nine hundred seventy-seven".