11611139 has 4 divisors (see below), whose sum is σ = 11659560. Its totient is φ = 11562720.

The previous prime is 11611133. The next prime is 11611151. The reversal of 11611139 is 93111611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93111611 = 277 ⋅336143.

It is a cyclic number.

It is not a de Polignac number, because 11611139 - 2¹⁶ = 11545603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11611133) 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, 23849 + ... + 24330.

It is an arithmetic number, because the mean of its divisors is an integer number (2914890).

Almost surely, 2^11611139 is an apocalyptic number.

11611139 is a deficient number, since it is larger than the sum of its proper divisors (48421).

11611139 is an equidigital number, since it uses as much as digits as its factorization.

11611139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48420.

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

The square root of 11611139 is about 3407.5121423115. The cubic root of 11611139 is about 226.4426740034.

The spelling of 11611139 in words is "eleven million, six hundred eleven thousand, one hundred thirty-nine".