631617 has 16 divisors (see below), whose sum is σ = 1013760. Its totient is φ = 341712.

The previous prime is 631613. The next prime is 631619. The reversal of 631617 is 716136.

It is not a de Polignac number, because 631617 - 2² = 631613 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 631617.

It is not an unprimeable number, because it can be changed into a prime (631613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393 + ... + 1190.

It is an arithmetic number, because the mean of its divisors is an integer number (63360).

2⁶³¹⁶¹⁷ is an apocalyptic number.

It is an amenable number.

631617 is a deficient number, since it is larger than the sum of its proper divisors (382143).

631617 is a wasteful number, since it uses less digits than its factorization.

631617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612.

The product of its digits is 756, while the sum is 24.

The square root of 631617 is about 794.7433548008. The cubic root of 631617 is about 85.7994696801.

The spelling of 631617 in words is "six hundred thirty-one thousand, six hundred seventeen".