8104139 has 4 divisors (see below), whose sum is σ = 8184480. Its totient is φ = 8023800.

The previous prime is 8104133. The next prime is 8104141. The reversal of 8104139 is 9314018.

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 8104139 - 2⁴ = 8104123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8104133) 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, 40019 + ... + 40220.

It is an arithmetic number, because the mean of its divisors is an integer number (2046120).

Almost surely, 2^8104139 is an apocalyptic number.

8104139 is a deficient number, since it is larger than the sum of its proper divisors (80341).

8104139 is a wasteful number, since it uses less digits than its factorization.

8104139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80340.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 8104139 is about 2846.7769494641. The cubic root of 8104139 is about 200.8640863971.

The spelling of 8104139 in words is "eight million, one hundred four thousand, one hundred thirty-nine".