8870656139 has 4 divisors (see below), whose sum is σ = 8871469320. Its totient is φ = 8869842960.

The previous prime is 8870656129. The next prime is 8870656159. The reversal of 8870656139 is 9316560788.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8870656139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8870656129) 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, 390002 + ... + 412119.

It is an arithmetic number, because the mean of its divisors is an integer number (2217867330).

Almost surely, 2^8870656139 is an apocalyptic number.

8870656139 is a deficient number, since it is larger than the sum of its proper divisors (813181).

8870656139 is a wasteful number, since it uses less digits than its factorization.

8870656139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813180.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 8870656139 is about 94184.1607649609. The cubic root of 8870656139 is about 2070.0710329814.

The spelling of 8870656139 in words is "eight billion, eight hundred seventy million, six hundred fifty-six thousand, one hundred thirty-nine".