631479 has 8 divisors (see below), whose sum is σ = 864880. Its totient is φ = 409536.

The previous prime is 631471. The next prime is 631483. The reversal of 631479 is 974136.

It is a happy number.

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

It is not a de Polignac number, because 631479 - 2³ = 631471 is a prime.

It is a Duffinian number.

631479 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 631479.

It is not an unprimeable number, because it can be changed into a prime (631471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2734 + ... + 2955.

It is an arithmetic number, because the mean of its divisors is an integer number (108110).

2⁶³¹⁴⁷⁹ is an apocalyptic number.

631479 is a deficient number, since it is larger than the sum of its proper divisors (233401).

631479 is a wasteful number, since it uses less digits than its factorization.

631479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5729.

The product of its digits is 4536, while the sum is 30.

The square root of 631479 is about 794.6565295774. The cubic root of 631479 is about 85.7932205401.

The spelling of 631479 in words is "six hundred thirty-one thousand, four hundred seventy-nine".