631966 has 8 divisors (see below), whose sum is σ = 978624. Its totient is φ = 305760.

The previous prime is 631937. The next prime is 631979. The reversal of 631966 is 669136.

631966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

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, 5035 + ... + 5158.

It is an arithmetic number, because the mean of its divisors is an integer number (122328).

2⁶³¹⁹⁶⁶ is an apocalyptic number.

631966 is a deficient number, since it is larger than the sum of its proper divisors (346658).

631966 is a wasteful number, since it uses less digits than its factorization.

631966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226.

The product of its digits is 5832, while the sum is 31.

The square root of 631966 is about 794.9628922157. The cubic root of 631966 is about 85.8152696039.

The spelling of 631966 in words is "six hundred thirty-one thousand, nine hundred sixty-six".