631876977 has 64 divisors (see below), whose sum is σ = 1022976000. Its totient is φ = 384165504.

The previous prime is 631876919. The next prime is 631877003. The reversal of 631876977 is 779678136.

It is not a de Polignac number, because 631876977 - 2⁶ = 631876913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631876477) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1759924 + ... + 1760282.

It is an arithmetic number, because the mean of its divisors is an integer number (15984000).

Almost surely, 2^631876977 is an apocalyptic number.

It is an amenable number.

631876977 is a deficient number, since it is larger than the sum of its proper divisors (391099023).

631876977 is a wasteful number, since it uses less digits than its factorization.

631876977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 501 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 631876977 is about 25137.1632647759. The cubic root of 631876977 is about 858.1123990849.

The spelling of 631876977 in words is "six hundred thirty-one million, eight hundred seventy-six thousand, nine hundred seventy-seven".