631975 has 12 divisors (see below), whose sum is σ = 830304. Its totient is φ = 475520.

The previous prime is 631937. The next prime is 631979. The reversal of 631975 is 579136.

631975 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 631975 - 2⁷ = 631847 is a prime.

It is a Duffinian number.

631975 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319 + ... + 1168.

It is an arithmetic number, because the mean of its divisors is an integer number (69192).

2⁶³¹⁹⁷⁵ is an apocalyptic number.

631975 is a deficient number, since it is larger than the sum of its proper divisors (198329).

631975 is a wasteful number, since it uses less digits than its factorization.

631975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 1509 counting only the distinct ones).

The product of its digits is 5670, while the sum is 31.

The square root of 631975 is about 794.9685528372. The cubic root of 631975 is about 85.8156769749.

The spelling of 631975 in words is "six hundred thirty-one thousand, nine hundred seventy-five".