331972313837 has 2 divisors, whose sum is σ = 331972313838. Its totient is φ = 331972313836.

The previous prime is 331972313821. The next prime is 331972313879. The reversal of 331972313837 is 738313279133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211470299881 + 120502013956 = 459859^2 + 347134^2 .

It is an emirp because it is prime and its reverse (738313279133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331972313837 - 2⁴ = 331972313821 is a prime.

It is a super-2 number, since 2×331972313837² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331972313137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165986156918 + 165986156919.

It is an arithmetic number, because the mean of its divisors is an integer number (165986156919).

Almost surely, 2^331972313837 is an apocalyptic number.

It is an amenable number.

331972313837 is a deficient number, since it is larger than the sum of its proper divisors (1).

331972313837 is an equidigital number, since it uses as much as digits as its factorization.

331972313837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 50.

The spelling of 331972313837 in words is "three hundred thirty-one billion, nine hundred seventy-two million, three hundred thirteen thousand, eight hundred thirty-seven".