8139913 has 4 divisors (see below), whose sum is σ = 8159760. Its totient is φ = 8120068.

The previous prime is 8139871. The next prime is 8139917. The reversal of 8139913 is 3199318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8139913 - 2¹⁷ = 8008841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8139917) 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 3 ways as a sum of consecutive naturals, for example, 9295 + ... + 10132.

It is an arithmetic number, because the mean of its divisors is an integer number (2039940).

Almost surely, 2^8139913 is an apocalyptic number.

It is an amenable number.

8139913 is a deficient number, since it is larger than the sum of its proper divisors (19847).

8139913 is a wasteful number, since it uses less digits than its factorization.

8139913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19846.

The product of its digits is 5832, while the sum is 34.

The square root of 8139913 is about 2853.0532767546. The cubic root of 8139913 is about 201.1592098484.

The spelling of 8139913 in words is "eight million, one hundred thirty-nine thousand, nine hundred thirteen".