631963 has 4 divisors (see below), whose sum is σ = 634680. Its totient is φ = 629248.

The previous prime is 631937. The next prime is 631979. The reversal of 631963 is 369136.

631963 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.

It is a cyclic number.

It is not a de Polignac number, because 631963 - 2⁵ = 631931 is a prime.

It is a Duffinian number.

631963 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (631903) 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, 973 + ... + 1486.

It is an arithmetic number, because the mean of its divisors is an integer number (158670).

2⁶³¹⁹⁶³ is an apocalyptic number.

631963 is a deficient number, since it is larger than the sum of its proper divisors (2717).

631963 is a wasteful number, since it uses less digits than its factorization.

631963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716.

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

The square root of 631963 is about 794.9610053330. The cubic root of 631963 is about 85.8151338127.

The spelling of 631963 in words is "six hundred thirty-one thousand, nine hundred sixty-three".