331489 has 2 divisors, whose sum is σ = 331490. Its totient is φ = 331488.

The previous prime is 331451. The next prime is 331501. The reversal of 331489 is 984133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 321489 + 10000 = 567^2 + 100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331489 is a prime.

It is not a weakly prime, because it can be changed into another prime (331589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165744 + 165745.

It is an arithmetic number, because the mean of its divisors is an integer number (165745).

2³³¹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

331489 is a deficient number, since it is larger than the sum of its proper divisors (1).

331489 is an equidigital number, since it uses as much as digits as its factorization.

331489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 331489 is about 575.7508141549. The cubic root of 331489 is about 69.2080119250.

It can be divided in two parts, 3314 and 89, that added together give a triangular number (3403 = T₈₂).

The spelling of 331489 in words is "three hundred thirty-one thousand, four hundred eighty-nine".