11105639 has 4 divisors (see below), whose sum is σ = 11115720. Its totient is φ = 11095560.

The previous prime is 11105609. The next prime is 11105651. The reversal of 11105639 is 93650111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 93650111 = 617 ⋅151783.

It is a cyclic number.

It is not a de Polignac number, because 11105639 - 2¹⁶ = 11040103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11105609) 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, 3152 + ... + 5669.

It is an arithmetic number, because the mean of its divisors is an integer number (2778930).

Almost surely, 2^11105639 is an apocalyptic number.

11105639 is a deficient number, since it is larger than the sum of its proper divisors (10081).

11105639 is an equidigital number, since it uses as much as digits as its factorization.

11105639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10080.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 11105639 is about 3332.5124155808. The cubic root of 11105639 is about 223.1076785639.

The spelling of 11105639 in words is "eleven million, one hundred five thousand, six hundred thirty-nine".