631970 has 8 divisors (see below), whose sum is σ = 1137564. Its totient is φ = 252784.

The previous prime is 631937. The next prime is 631979. The reversal of 631970 is 79136.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 588289 + 43681 = 767^2 + 209^2 .

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

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

631970 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31589 + ... + 31608.

2⁶³¹⁹⁷⁰ is an apocalyptic number.

631970 is a deficient number, since it is larger than the sum of its proper divisors (505594).

631970 is a wasteful number, since it uses less digits than its factorization.

631970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63204.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 631970 is about 794.9654080525. The cubic root of 631970 is about 85.8154506581.

The spelling of 631970 in words is "six hundred thirty-one thousand, nine hundred seventy".