8717139 has 24 divisors (see below), whose sum is σ = 13518960. Its totient is φ = 5606496.

The previous prime is 8717131. The next prime is 8717171. The reversal of 8717139 is 9317178.

It is not a de Polignac number, because 8717139 - 2³ = 8717131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8717131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6429 + ... + 7665.

It is an arithmetic number, because the mean of its divisors is an integer number (563290).

Almost surely, 2^8717139 is an apocalyptic number.

8717139 is a deficient number, since it is larger than the sum of its proper divisors (4801821).

8717139 is a wasteful number, since it uses less digits than its factorization.

8717139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281 (or 1269 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 8717139 is about 2952.4801438790. The cubic root of 8717139 is about 205.8059803275.

The spelling of 8717139 in words is "eight million, seven hundred seventeen thousand, one hundred thirty-nine".