11718139 has 4 divisors (see below), whose sum is σ = 11733400. Its totient is φ = 11702880.

The previous prime is 11718137. The next prime is 11718191. The reversal of 11718139 is 93181711.

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 11718139 - 2¹ = 11718137 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 11718139.

It is not an unprimeable number, because it can be changed into a prime (11718131) 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, 6414 + ... + 8035.

It is an arithmetic number, because the mean of its divisors is an integer number (2933350).

Almost surely, 2^11718139 is an apocalyptic number.

11718139 is a deficient number, since it is larger than the sum of its proper divisors (15261).

11718139 is an equidigital number, since it uses as much as digits as its factorization.

11718139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15260.

The product of its digits is 1512, while the sum is 31.

The square root of 11718139 is about 3423.1767409820. The cubic root of 11718139 is about 227.1361264419.

The spelling of 11718139 in words is "eleven million, seven hundred eighteen thousand, one hundred thirty-nine".