631420877 has 4 divisors (see below), whose sum is σ = 632422176. Its totient is φ = 630419580.

The previous prime is 631420861. The next prime is 631420883. The reversal of 631420877 is 778024136.

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 631420877 - 2⁴ = 631420861 is a prime.

It is a super-2 number, since 2×631420877² = 797384647822898258, which contains 22 as substring.

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 631420877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631420837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499703 + ... + 500964.

It is an arithmetic number, because the mean of its divisors is an integer number (158105544).

Almost surely, 2^631420877 is an apocalyptic number.

It is an amenable number.

631420877 is a deficient number, since it is larger than the sum of its proper divisors (1001299).

631420877 is a wasteful number, since it uses less digits than its factorization.

631420877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001298.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 631420877 is about 25128.0894021014. The cubic root of 631420877 is about 857.9058824755.

The spelling of 631420877 in words is "six hundred thirty-one million, four hundred twenty thousand, eight hundred seventy-seven".