6139879 has 4 divisors (see below), whose sum is σ = 6174360. Its totient is φ = 6105400.

The previous prime is 6139871. The next prime is 6139883. The reversal of 6139879 is 9789316.

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

It is a cyclic number.

It is not a de Polignac number, because 6139879 - 2³ = 6139871 is a prime.

It is a super-2 number, since 2×6139879² = 75396228269282, which contains 22 as substring.

It is a Duffinian number.

6139879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6139871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16972 + ... + 17329.

It is an arithmetic number, because the mean of its divisors is an integer number (1543590).

Almost surely, 2^6139879 is an apocalyptic number.

6139879 is a deficient number, since it is larger than the sum of its proper divisors (34481).

6139879 is a wasteful number, since it uses less digits than its factorization.

6139879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34480.

The product of its digits is 81648, while the sum is 43.

The square root of 6139879 is about 2477.8779227395. The cubic root of 6139879 is about 183.1133202800.

The spelling of 6139879 in words is "six million, one hundred thirty-nine thousand, eight hundred seventy-nine".