631094839 has 4 divisors (see below), whose sum is σ = 652856760. Its totient is φ = 609332920.

The previous prime is 631094833. The next prime is 631094843. The reversal of 631094839 is 938490136.

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

It is not a de Polignac number, because 631094839 - 2²⁷ = 496877111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631094795 and 631094804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631094833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10880917 + ... + 10880974.

It is an arithmetic number, because the mean of its divisors is an integer number (163214190).

Almost surely, 2^631094839 is an apocalyptic number.

631094839 is a deficient number, since it is larger than the sum of its proper divisors (21761921).

631094839 is a wasteful number, since it uses less digits than its factorization.

631094839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21761920.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 631094839 is about 25121.6010437233. The cubic root of 631094839 is about 857.7581954174.

The spelling of 631094839 in words is "six hundred thirty-one million, ninety-four thousand, eight hundred thirty-nine".