631693 has 4 divisors (see below), whose sum is σ = 664960. Its totient is φ = 598428.

The previous prime is 631681. The next prime is 631711. The reversal of 631693 is 396136.

631693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 631693 - 2⁹ = 631181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16605 + ... + 16642.

It is an arithmetic number, because the mean of its divisors is an integer number (166240).

2⁶³¹⁶⁹³ is an apocalyptic number.

It is an amenable number.

631693 is a deficient number, since it is larger than the sum of its proper divisors (33267).

631693 is a wasteful number, since it uses less digits than its factorization.

631693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33266.

The product of its digits is 2916, while the sum is 28.

The square root of 631693 is about 794.7911675403. The cubic root of 631693 is about 85.8029108468.

The spelling of 631693 in words is "six hundred thirty-one thousand, six hundred ninety-three".