631322963 has 4 divisors (see below), whose sum is σ = 631402848. Its totient is φ = 631243080.

The previous prime is 631322927. The next prime is 631323019. The reversal of 631322963 is 369223136.

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 631322963 - 2¹⁶ = 631257427 is a prime.

It is a super-2 number, since 2×631322963² = 797137367222198738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631352963) 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, 26603 + ... + 44388.

It is an arithmetic number, because the mean of its divisors is an integer number (157850712).

Almost surely, 2^631322963 is an apocalyptic number.

631322963 is a deficient number, since it is larger than the sum of its proper divisors (79885).

631322963 is an equidigital number, since it uses as much as digits as its factorization.

631322963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79884.

The product of its digits is 34992, while the sum is 35.

The square root of 631322963 is about 25126.1410288170. The cubic root of 631322963 is about 857.8615352252.

The spelling of 631322963 in words is "six hundred thirty-one million, three hundred twenty-two thousand, nine hundred sixty-three".