331587974849 has 2 divisors, whose sum is σ = 331587974850. Its totient is φ = 331587974848.

The previous prime is 331587974807. The next prime is 331587974989. The reversal of 331587974849 is 948479785133.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296732951824 + 34855023025 = 544732^2 + 186695^2 .

It is an emirp because it is prime and its reverse (948479785133) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331587974849 is a prime.

It is a super-2 number, since 2×331587974849² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331587970849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165793987424 + 165793987425.

It is an arithmetic number, because the mean of its divisors is an integer number (165793987425).

Almost surely, 2^331587974849 is an apocalyptic number.

It is an amenable number.

331587974849 is a deficient number, since it is larger than the sum of its proper divisors (1).

331587974849 is an equidigital number, since it uses as much as digits as its factorization.

331587974849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 182891520, while the sum is 68.

The spelling of 331587974849 in words is "three hundred thirty-one billion, five hundred eighty-seven million, nine hundred seventy-four thousand, eight hundred forty-nine".