11161139 has 4 divisors (see below), whose sum is σ = 12175800. Its totient is φ = 10146480.

The previous prime is 11161127. The next prime is 11161153. The reversal of 11161139 is 93116111.

11161139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93116111 = 11 ⋅8465101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11161139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11161159) 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, 507314 + ... + 507335.

It is an arithmetic number, because the mean of its divisors is an integer number (3043950).

Almost surely, 2^11161139 is an apocalyptic number.

11161139 is a deficient number, since it is larger than the sum of its proper divisors (1014661).

11161139 is a wasteful number, since it uses less digits than its factorization.

11161139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014660.

The product of its digits is 162, while the sum is 23.

The square root of 11161139 is about 3340.8290887144. The cubic root of 11161139 is about 223.4787184851.

The spelling of 11161139 in words is "eleven million, one hundred sixty-one thousand, one hundred thirty-nine".