331294289 has 6 divisors (see below), whose sum is σ = 343113030. Its totient is φ = 319869536.

The previous prime is 331294261. The next prime is 331294291. The reversal of 331294289 is 982492133.

It can be written as a sum of positive squares in 3 ways, for example, as 1254400 + 330039889 = 1120^2 + 18167^2 .

It is a de Polignac number, because none of the positive numbers 2^k-331294289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331294219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 196124 + ... + 197805.

It is an arithmetic number, because the mean of its divisors is an integer number (57185505).

Almost surely, 2^331294289 is an apocalyptic number.

It is an amenable number.

331294289 is a deficient number, since it is larger than the sum of its proper divisors (11818741).

331294289 is an equidigital number, since it uses as much as digits as its factorization.

331294289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393987 (or 393958 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 331294289 is about 18201.4913949379. The cubic root of 331294289 is about 691.9445873468.

The spelling of 331294289 in words is "three hundred thirty-one million, two hundred ninety-four thousand, two hundred eighty-nine".