631874317 has 4 divisors (see below), whose sum is σ = 665130880. Its totient is φ = 598617756.

The previous prime is 631874297. The next prime is 631874323. The reversal of 631874317 is 713478136.

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 631874317 - 2⁷ = 631874189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631874317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631874017) 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, 16628253 + ... + 16628290.

It is an arithmetic number, because the mean of its divisors is an integer number (166282720).

Almost surely, 2^631874317 is an apocalyptic number.

It is an amenable number.

631874317 is a deficient number, since it is larger than the sum of its proper divisors (33256563).

631874317 is a wasteful number, since it uses less digits than its factorization.

631874317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33256562.

The product of its digits is 84672, while the sum is 40.

The square root of 631874317 is about 25137.1103550110. The cubic root of 631874317 is about 858.1111949570. Note that the first 4 decimals are identical.

The spelling of 631874317 in words is "six hundred thirty-one million, eight hundred seventy-four thousand, three hundred seventeen".