631654 has 16 divisors (see below), whose sum is σ = 991440. Its totient is φ = 301600.

The previous prime is 631643. The next prime is 631667. The reversal of 631654 is 456136.

631654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

631654 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6204 + ... + 6304.

It is an arithmetic number, because the mean of its divisors is an integer number (61965).

2⁶³¹⁶⁵⁴ is an apocalyptic number.

631654 is a deficient number, since it is larger than the sum of its proper divisors (359786).

631654 is a wasteful number, since it uses less digits than its factorization.

631654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215.

The product of its digits is 2160, while the sum is 25.

The square root of 631654 is about 794.7666324148. The cubic root of 631654 is about 85.8011450194.

The spelling of 631654 in words is "six hundred thirty-one thousand, six hundred fifty-four".