631144 has 8 divisors (see below), whose sum is σ = 1183410. Its totient is φ = 315568.

The previous prime is 631139. The next prime is 631151. The reversal of 631144 is 441136.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 562500 + 68644 = 750^2 + 262^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

631144 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 as a sum of consecutive naturals, namely, 39439 + ... + 39454.

2⁶³¹¹⁴⁴ is an apocalyptic number.

It is an amenable number.

631144 is a deficient number, since it is larger than the sum of its proper divisors (552266).

631144 is a wasteful number, since it uses less digits than its factorization.

631144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78899 (or 78895 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 631144 is about 794.4457187247. The cubic root of 631144 is about 85.7780467377.

The spelling of 631144 in words is "six hundred thirty-one thousand, one hundred forty-four".