331344389 has 2 divisors, whose sum is σ = 331344390. Its totient is φ = 331344388.

The previous prime is 331344379. The next prime is 331344421. The reversal of 331344389 is 983443133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267584164 + 63760225 = 16358^2 + 7985^2 .

It is a cyclic number.

It is not a de Polignac number, because 331344389 - 2⁸ = 331344133 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_17853824 and since 331344389 and 17853824 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331344359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165672194 + 165672195.

It is an arithmetic number, because the mean of its divisors is an integer number (165672195).

Almost surely, 2^331344389 is an apocalyptic number.

It is an amenable number.

331344389 is a deficient number, since it is larger than the sum of its proper divisors (1).

331344389 is an equidigital number, since it uses as much as digits as its factorization.

331344389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 38.

The square root of 331344389 is about 18202.8676037596. The cubic root of 331344389 is about 691.9794653768.

The spelling of 331344389 in words is "three hundred thirty-one million, three hundred forty-four thousand, three hundred eighty-nine".