320489031 has 4 divisors (see below), whose sum is σ = 427318712. Its totient is φ = 213659352.

The previous prime is 320489027. The next prime is 320489041. The reversal of 320489031 is 130984023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130984023 = 3 ⋅43661341.

It is not a de Polignac number, because 320489031 - 2² = 320489027 is a prime.

It is a super-2 number, since 2×320489031² = 205426437982637922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320489031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320489041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53414836 + ... + 53414841.

It is an arithmetic number, because the mean of its divisors is an integer number (106829678).

Almost surely, 2^320489031 is an apocalyptic number.

320489031 is a deficient number, since it is larger than the sum of its proper divisors (106829681).

320489031 is a wasteful number, since it uses less digits than its factorization.

320489031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106829680.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 320489031 is about 17902.2074337217. The cubic root of 320489031 is about 684.3386310149.

It can be divided in two parts, 3204 and 89031, that added together give a triangular number (92235 = T₄₂₉).

The spelling of 320489031 in words is "three hundred twenty million, four hundred eighty-nine thousand, thirty-one".