11685139 has 4 divisors (see below), whose sum is σ = 11694256. Its totient is φ = 11676024.

The previous prime is 11685101. The next prime is 11685151. The reversal of 11685139 is 93158611.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11685139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11685169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2244 + ... + 5329.

It is an arithmetic number, because the mean of its divisors is an integer number (2923564).

Almost surely, 2^11685139 is an apocalyptic number.

11685139 is a deficient number, since it is larger than the sum of its proper divisors (9117).

11685139 is an equidigital number, since it uses as much as digits as its factorization.

11685139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9116.

The product of its digits is 6480, while the sum is 34.

The square root of 11685139 is about 3418.3532585150. The cubic root of 11685139 is about 226.9227097512.

The spelling of 11685139 in words is "eleven million, six hundred eighty-five thousand, one hundred thirty-nine".