631317 has 8 divisors (see below), whose sum is σ = 848896. Its totient is φ = 417312.

The previous prime is 631307. The next prime is 631339. The reversal of 631317 is 713136.

631317 is digitally balanced in base 7, 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 631317 - 2⁸ = 631061 is a prime.

It is a super-2 number, since 2×631317² = 797122308978, which contains 22 as substring.

It is a Duffinian number.

631317 is strictly pandigital in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 631293 and 631302.

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 631317.

It is not an unprimeable number, because it can be changed into a prime (631307) 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, 448 + ... + 1209.

It is an arithmetic number, because the mean of its divisors is an integer number (106112).

2⁶³¹³¹⁷ is an apocalyptic number.

It is an amenable number.

631317 is a deficient number, since it is larger than the sum of its proper divisors (217579).

631317 is a wasteful number, since it uses less digits than its factorization.

631317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787.

The product of its digits is 378, while the sum is 21.

The square root of 631317 is about 794.5545922087. The cubic root of 631317 is about 85.7858834313.

The spelling of 631317 in words is "six hundred thirty-one thousand, three hundred seventeen".