631670 has 32 divisors (see below), whose sum is σ = 1264032. Its totient is φ = 225792.

The previous prime is 631667. The next prime is 631679. The reversal of 631670 is 76136.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631679) 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 15 ways as a sum of consecutive naturals, for example, 5534 + ... + 5646.

It is an arithmetic number, because the mean of its divisors is an integer number (39501).

2⁶³¹⁶⁷⁰ is an apocalyptic number.

631670 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631670 is a wasteful number, since it uses less digits than its factorization.

631670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 631670 is about 794.7766981989. The cubic root of 631670 is about 85.8018694702.

The spelling of 631670 in words is "six hundred thirty-one thousand, six hundred seventy".