331680404173 has 2 divisors, whose sum is σ = 331680404174. Its totient is φ = 331680404172.

The previous prime is 331680404129. The next prime is 331680404179. The reversal of 331680404173 is 371404086133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208298221609 + 123382182564 = 456397^2 + 351258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331680404173 is a prime.

It is a super-2 number, since 2×331680404173² (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 (331680404179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165840202086 + 165840202087.

It is an arithmetic number, because the mean of its divisors is an integer number (165840202087).

Almost surely, 2^331680404173 is an apocalyptic number.

It is an amenable number.

331680404173 is a deficient number, since it is larger than the sum of its proper divisors (1).

331680404173 is an equidigital number, since it uses as much as digits as its factorization.

331680404173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 331680404173 in words is "three hundred thirty-one billion, six hundred eighty million, four hundred four thousand, one hundred seventy-three".