8790139 has 4 divisors (see below), whose sum is σ = 9307224. Its totient is φ = 8273056.

The previous prime is 8790137. The next prime is 8790151. The reversal of 8790139 is 9310978.

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 8790139 - 2¹ = 8790137 is a prime.

It is a Duffinian number.

8790139 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8790098 and 8790107.

It is not an unprimeable number, because it can be changed into a prime (8790137) 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, 258517 + ... + 258550.

It is an arithmetic number, because the mean of its divisors is an integer number (2326806).

Almost surely, 2^8790139 is an apocalyptic number.

8790139 is a deficient number, since it is larger than the sum of its proper divisors (517085).

8790139 is a wasteful number, since it uses less digits than its factorization.

8790139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517084.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 8790139 is about 2964.8168577502. The cubic root of 8790139 is about 206.3788782519.

The spelling of 8790139 in words is "eight million, seven hundred ninety thousand, one hundred thirty-nine".