631504893 has 8 divisors (see below), whose sum is σ = 844663968. Its totient is φ = 419674544.

The previous prime is 631504891. The next prime is 631504921. The reversal of 631504893 is 398405136.

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

It is a cyclic number.

It is not a de Polignac number, because 631504893 - 2¹ = 631504891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631504891) 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, 331071 + ... + 332972.

It is an arithmetic number, because the mean of its divisors is an integer number (105582996).

Almost surely, 2^631504893 is an apocalyptic number.

It is an amenable number.

631504893 is a deficient number, since it is larger than the sum of its proper divisors (213159075).

631504893 is a wasteful number, since it uses less digits than its factorization.

631504893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664363.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 631504893 is about 25129.7611011327. The cubic root of 631504893 is about 857.9439313832.

The spelling of 631504893 in words is "six hundred thirty-one million, five hundred four thousand, eight hundred ninety-three".