8631939 has 4 divisors (see below), whose sum is σ = 11509256. Its totient is φ = 5754624.

The previous prime is 8631911. The next prime is 8631943. The reversal of 8631939 is 9391368.

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

It is not a de Polignac number, because 8631939 - 2⁵ = 8631907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8631897 and 8631906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8631979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1438654 + ... + 1438659.

It is an arithmetic number, because the mean of its divisors is an integer number (2877314).

Almost surely, 2^8631939 is an apocalyptic number.

8631939 is a deficient number, since it is larger than the sum of its proper divisors (2877317).

8631939 is a wasteful number, since it uses less digits than its factorization.

8631939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877316.

The product of its digits is 34992, while the sum is 39.

The square root of 8631939 is about 2938.0161674164. The cubic root of 8631939 is about 205.1332783923.

The spelling of 8631939 in words is "eight million, six hundred thirty-one thousand, nine hundred thirty-nine".