8139791 has 6 divisors (see below), whose sum is σ = 8947176. Its totient is φ = 7399700.

The previous prime is 8139773. The next prime is 8139797. The reversal of 8139791 is 1979318.

It is not a de Polignac number, because 8139791 - 2¹⁴ = 8123407 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 (8139797) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33515 + ... + 33756.

It is an arithmetic number, because the mean of its divisors is an integer number (1491196).

Almost surely, 2^8139791 is an apocalyptic number.

8139791 is a deficient number, since it is larger than the sum of its proper divisors (807385).

8139791 is a wasteful number, since it uses less digits than its factorization.

8139791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67293 (or 67282 counting only the distinct ones).

The product of its digits is 13608, while the sum is 38.

The square root of 8139791 is about 2853.0318960713. The cubic root of 8139791 is about 201.1582048603.

The spelling of 8139791 in words is "eight million, one hundred thirty-nine thousand, seven hundred ninety-one".