331889 has 2 divisors, whose sum is σ = 331890. Its totient is φ = 331888.

The previous prime is 331883. The next prime is 331897. The reversal of 331889 is 988133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187489 + 144400 = 433^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 331889 - 2¹⁶ = 266353 is a prime.

It is a super-2 number, since 2×331889² = 220300616642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165944 + 165945.

It is an arithmetic number, because the mean of its divisors is an integer number (165945).

2³³¹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

331889 is a deficient number, since it is larger than the sum of its proper divisors (1).

331889 is an equidigital number, since it uses as much as digits as its factorization.

331889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 331889 is about 576.0980819270. The cubic root of 331889 is about 69.2358379638.

The spelling of 331889 in words is "three hundred thirty-one thousand, eight hundred eighty-nine".