631611877 has 4 divisors (see below), whose sum is σ = 680197420. Its totient is φ = 583026336.

The previous prime is 631611859. The next prime is 631611899. The reversal of 631611877 is 778116136.

631611877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26894596 + 604717281 = 5186^2 + 24591^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631611877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631611977) 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, 24292752 + ... + 24292777.

It is an arithmetic number, because the mean of its divisors is an integer number (170049355).

Almost surely, 2^631611877 is an apocalyptic number.

It is an amenable number.

631611877 is a deficient number, since it is larger than the sum of its proper divisors (48585543).

631611877 is a wasteful number, since it uses less digits than its factorization.

631611877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48585542.

The product of its digits is 42336, while the sum is 40.

The square root of 631611877 is about 25131.8896424443. The cubic root of 631611877 is about 857.9923770837.

The spelling of 631611877 in words is "six hundred thirty-one million, six hundred eleven thousand, eight hundred seventy-seven".