6139913 has 4 divisors (see below), whose sum is σ = 6612228. Its totient is φ = 5667600.

The previous prime is 6139901. The next prime is 6139921. The reversal of 6139913 is 3199316.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1352569 + 4787344 = 1163^2 + 2188^2 .

It is a cyclic number.

It is not a de Polignac number, because 6139913 - 2⁴ = 6139897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6139913.

It is not an unprimeable number, because it can be changed into a prime (6139993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236138 + ... + 236163.

It is an arithmetic number, because the mean of its divisors is an integer number (1653057).

Almost surely, 2^6139913 is an apocalyptic number.

It is an amenable number.

6139913 is a deficient number, since it is larger than the sum of its proper divisors (472315).

6139913 is a wasteful number, since it uses less digits than its factorization.

6139913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472314.

The product of its digits is 4374, while the sum is 32.

The square root of 6139913 is about 2477.8847834393. The cubic root of 6139913 is about 183.1136582802.

The spelling of 6139913 in words is "six million, one hundred thirty-nine thousand, nine hundred thirteen".