631945077 has 8 divisors (see below), whose sum is σ = 844284000. Its totient is φ = 420451440.

The previous prime is 631945057. The next prime is 631945087. The reversal of 631945077 is 770549136.

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

It is not a de Polignac number, because 631945077 - 2⁸ = 631944821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631945057) 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, 209574 + ... + 212567.

It is an arithmetic number, because the mean of its divisors is an integer number (105535500).

Almost surely, 2^631945077 is an apocalyptic number.

It is an amenable number.

631945077 is a deficient number, since it is larger than the sum of its proper divisors (212338923).

631945077 is a wasteful number, since it uses less digits than its factorization.

631945077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422643.

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 631945077 is about 25138.5177964016. The cubic root of 631945077 is about 858.1432254204.

The spelling of 631945077 in words is "six hundred thirty-one million, nine hundred forty-five thousand, seventy-seven".