8139379 has 4 divisors (see below), whose sum is σ = 8618184. Its totient is φ = 7660576.

The previous prime is 8139377. The next prime is 8139403. The reversal of 8139379 is 9739318.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9739318 = 2 ⋅4869659.

It is a cyclic number.

It is not a de Polignac number, because 8139379 - 2¹ = 8139377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8139377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239377 + ... + 239410.

It is an arithmetic number, because the mean of its divisors is an integer number (2154546).

Almost surely, 2^8139379 is an apocalyptic number.

8139379 is a deficient number, since it is larger than the sum of its proper divisors (478805).

8139379 is a wasteful number, since it uses less digits than its factorization.

8139379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478804.

The product of its digits is 40824, while the sum is 40.

The square root of 8139379 is about 2852.9596912680. The cubic root of 8139379 is about 201.1548108920.

The spelling of 8139379 in words is "eight million, one hundred thirty-nine thousand, three hundred seventy-nine".