631239 has 8 divisors (see below), whose sum is σ = 961920. Its totient is φ = 360696.

The previous prime is 631229. The next prime is 631247. The reversal of 631239 is 932136.

631239 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 not a de Polignac number, because 631239 - 2⁴ = 631223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15009 + ... + 15050.

It is an arithmetic number, because the mean of its divisors is an integer number (120240).

2⁶³¹²³⁹ is an apocalyptic number.

631239 is a deficient number, since it is larger than the sum of its proper divisors (330681).

631239 is a wasteful number, since it uses less digits than its factorization.

631239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30069.

The product of its digits is 972, while the sum is 24.

The square root of 631239 is about 794.5055065888. The cubic root of 631239 is about 85.7823503016.

The spelling of 631239 in words is "six hundred thirty-one thousand, two hundred thirty-nine".