331684 has 12 divisors (see below), whose sum is σ = 586908. Its totient is φ = 164000.

The previous prime is 331663. The next prime is 331691. The reversal of 331684 is 486133.

It can be written as a sum of positive squares in 2 ways, for example, as 222784 + 108900 = 472^2 + 330^2 .

It is a super-2 number, since 2×331684² = 220028551712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7 + ... + 814.

It is an arithmetic number, because the mean of its divisors is an integer number (48909).

2³³¹⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

331684 is a deficient number, since it is larger than the sum of its proper divisors (255224).

331684 is a wasteful number, since it uses less digits than its factorization.

331684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 924 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 331684 is about 575.9201333518. The cubic root of 331684 is about 69.2215799136.

Subtracting 331684 from its reverse (486133), we obtain a square (154449 = 393²).

The spelling of 331684 in words is "three hundred thirty-one thousand, six hundred eighty-four".