31670520977 has 2 divisors, whose sum is σ = 31670520978. Its totient is φ = 31670520976.

The previous prime is 31670520919. The next prime is 31670520997. The reversal of 31670520977 is 77902507613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30485509201 + 1185011776 = 174601^2 + 34424^2 .

It is a cyclic number.

It is not a de Polignac number, because 31670520977 - 2¹⁸ = 31670258833 is a prime.

It is not a weakly prime, because it can be changed into another prime (31670520997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15835260488 + 15835260489.

It is an arithmetic number, because the mean of its divisors is an integer number (15835260489).

Almost surely, 2^31670520977 is an apocalyptic number.

It is an amenable number.

31670520977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31670520977 is an equidigital number, since it uses as much as digits as its factorization.

31670520977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 555660, while the sum is 47.

The spelling of 31670520977 in words is "thirty-one billion, six hundred seventy million, five hundred twenty thousand, nine hundred seventy-seven".