8139789 has 24 divisors (see below), whose sum is σ = 13728000. Its totient is φ = 4550688.

The previous prime is 8139773. The next prime is 8139797. The reversal of 8139789 is 9879318.

It is not a de Polignac number, because 8139789 - 2⁴ = 8139773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8139709) 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 23 ways as a sum of consecutive naturals, for example, 1587 + ... + 4335.

It is an arithmetic number, because the mean of its divisors is an integer number (572000).

Almost surely, 2^8139789 is an apocalyptic number.

It is an amenable number.

8139789 is a deficient number, since it is larger than the sum of its proper divisors (5588211).

8139789 is a wasteful number, since it uses less digits than its factorization.

8139789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809 (or 2806 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 8139789 is about 2853.0315455669. The cubic root of 8139789 is about 201.1581883850.

The spelling of 8139789 in words is "eight million, one hundred thirty-nine thousand, seven hundred eighty-nine".