331322989 has 2 divisors, whose sum is σ = 331322990. Its totient is φ = 331322988.

The previous prime is 331322963. The next prime is 331323023. The reversal of 331322989 is 989223133.

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., 321018889 + 10304100 = 17917^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 331322989 - 2¹⁵ = 331290221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331320989) 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, 165661494 + 165661495.

It is an arithmetic number, because the mean of its divisors is an integer number (165661495).

Almost surely, 2^331322989 is an apocalyptic number.

It is an amenable number.

331322989 is a deficient number, since it is larger than the sum of its proper divisors (1).

331322989 is an equidigital number, since it uses as much as digits as its factorization.

331322989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 331322989 is about 18202.2797747974. The cubic root of 331322989 is about 691.9645678061.

The spelling of 331322989 in words is "three hundred thirty-one million, three hundred twenty-two thousand, nine hundred eighty-nine".