8712139 has 4 divisors (see below), whose sum is σ = 8719480. Its totient is φ = 8704800.

The previous prime is 8712133. The next prime is 8712149. The reversal of 8712139 is 9312178.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9312178 = 2 ⋅4656089.

It is a cyclic number.

It is not a de Polignac number, because 8712139 - 2⁹ = 8711627 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 8712139.

It is not an unprimeable number, because it can be changed into a prime (8712133) 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, 1437 + ... + 4414.

It is an arithmetic number, because the mean of its divisors is an integer number (2179870).

Almost surely, 2^8712139 is an apocalyptic number.

8712139 is a deficient number, since it is larger than the sum of its proper divisors (7341).

8712139 is a wasteful number, since it uses less digits than its factorization.

8712139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7340.

The product of its digits is 3024, while the sum is 31.

The square root of 8712139 is about 2951.6332766792. The cubic root of 8712139 is about 205.7666238862.

The spelling of 8712139 in words is "eight million, seven hundred twelve thousand, one hundred thirty-nine".