331343189 has 2 divisors, whose sum is σ = 331343190. Its totient is φ = 331343188.

The previous prime is 331343167. The next prime is 331343203. The reversal of 331343189 is 981343133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189971089 + 141372100 = 13783^2 + 11890^2 .

It is a cyclic number.

It is not a de Polignac number, because 331343189 - 2⁸ = 331342933 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331343119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165671594 + 165671595.

It is an arithmetic number, because the mean of its divisors is an integer number (165671595).

Almost surely, 2^331343189 is an apocalyptic number.

It is an amenable number.

331343189 is a deficient number, since it is larger than the sum of its proper divisors (1).

331343189 is an equidigital number, since it uses as much as digits as its factorization.

331343189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 331343189 is about 18202.8346418903. The cubic root of 331343189 is about 691.9786300160.

The spelling of 331343189 in words is "three hundred thirty-one million, three hundred forty-three thousand, one hundred eighty-nine".