631684 has 12 divisors (see below), whose sum is σ = 1120000. Its totient is φ = 311688.

The previous prime is 631681. The next prime is 631711. The reversal of 631684 is 486136.

It is not an unprimeable number, because it can be changed into a prime (631681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684 + ... + 1315.

2⁶³¹⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

631684 is a deficient number, since it is larger than the sum of its proper divisors (488316).

631684 is a wasteful number, since it uses less digits than its factorization.

631684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082 (or 2080 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 631684 is about 794.7855056555. The cubic root of 631684 is about 85.8025033546.

It can be divided in two parts, 6316 and 84, that added together give a square (6400 = 80²).

The spelling of 631684 in words is "six hundred thirty-one thousand, six hundred eighty-four".