631394 has 4 divisors (see below), whose sum is σ = 947094. Its totient is φ = 315696.

The previous prime is 631391. The next prime is 631399. The reversal of 631394 is 493136.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 405769 + 225625 = 637^2 + 475^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 631394.

It is not an unprimeable number, because it can be changed into a prime (631391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157847 + ... + 157850.

2⁶³¹³⁹⁴ is an apocalyptic number.

631394 is a deficient number, since it is larger than the sum of its proper divisors (315700).

631394 is a wasteful number, since it uses less digits than its factorization.

631394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315699.

The product of its digits is 1944, while the sum is 26.

The square root of 631394 is about 794.6030455517. The cubic root of 631394 is about 85.7893709790.

The spelling of 631394 in words is "six hundred thirty-one thousand, three hundred ninety-four".