31982638841 has 2 divisors, whose sum is σ = 31982638842. Its totient is φ = 31982638840.

The previous prime is 31982638829. The next prime is 31982638843. The reversal of 31982638841 is 14883628913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31511575225 + 471063616 = 177515^2 + 21704^2 .

It is a cyclic number.

It is not a de Polignac number, because 31982638841 - 2²⁶ = 31915529977 is a prime.

It is a Sophie Germain prime.

Together with 31982638843, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31982638843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15991319420 + 15991319421.

It is an arithmetic number, because the mean of its divisors is an integer number (15991319421).

Almost surely, 2^31982638841 is an apocalyptic number.

It is an amenable number.

31982638841 is a deficient number, since it is larger than the sum of its proper divisors (1).

31982638841 is an equidigital number, since it uses as much as digits as its factorization.

31982638841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1990656, while the sum is 53.

The spelling of 31982638841 in words is "thirty-one billion, nine hundred eighty-two million, six hundred thirty-eight thousand, eight hundred forty-one".