331587974989 has 2 divisors, whose sum is σ = 331587974990. Its totient is φ = 331587974988.

The previous prime is 331587974849. The next prime is 331587975029. The reversal of 331587974989 is 989479785133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 329409419364 + 2178555625 = 573942^2 + 46675^2 .

It is a cyclic number.

It is not a de Polignac number, because 331587974989 - 2¹³ = 331587966797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331587974089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165793987494 + 165793987495.

It is an arithmetic number, because the mean of its divisors is an integer number (165793987495).

Almost surely, 2^331587974989 is an apocalyptic number.

It is an amenable number.

331587974989 is a deficient number, since it is larger than the sum of its proper divisors (1).

331587974989 is an equidigital number, since it uses as much as digits as its factorization.

331587974989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 411505920, while the sum is 73.

The spelling of 331587974989 in words is "three hundred thirty-one billion, five hundred eighty-seven million, nine hundred seventy-four thousand, nine hundred eighty-nine".