631868263 has 8 divisors (see below), whose sum is σ = 690058656. Its totient is φ = 575047200.

The previous prime is 631868239. The next prime is 631868287. The reversal of 631868263 is 362868136.

It is an interprime number because it is at equal distance from previous prime (631868239) and next prime (631868287).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 631868263 - 2⁹ = 631867751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631868233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341368 + ... + 343213.

It is an arithmetic number, because the mean of its divisors is an integer number (86257332).

Almost surely, 2^631868263 is an apocalyptic number.

631868263 is a deficient number, since it is larger than the sum of its proper divisors (58190393).

631868263 is a wasteful number, since it uses less digits than its factorization.

631868263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684665.

The product of its digits is 248832, while the sum is 43.

The square root of 631868263 is about 25136.9899351533. The cubic root of 631868263 is about 858.1084544216.

The spelling of 631868263 in words is "six hundred thirty-one million, eight hundred sixty-eight thousand, two hundred sixty-three".