631906 has 8 divisors (see below), whose sum is σ = 1034064. Its totient is φ = 287220.

The previous prime is 631903. The next prime is 631913. The reversal of 631906 is 609136.

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

It is not an unprimeable number, because it can be changed into a prime (631901) 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, 14340 + ... + 14383.

It is an arithmetic number, because the mean of its divisors is an integer number (129258).

2⁶³¹⁹⁰⁶ is an apocalyptic number.

631906 is a deficient number, since it is larger than the sum of its proper divisors (402158).

631906 is a wasteful number, since it uses less digits than its factorization.

631906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28736.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 631906 is about 794.9251537095. The cubic root of 631906 is about 85.8125536988.

The spelling of 631906 in words is "six hundred thirty-one thousand, nine hundred six".