11911039 has 4 divisors (see below), whose sum is σ = 13612624. Its totient is φ = 10209456.

The previous prime is 11911027. The next prime is 11911057. The reversal of 11911039 is 93011911.

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 11911039 - 2¹⁵ = 11878271 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 (11911019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850782 + ... + 850795.

It is an arithmetic number, because the mean of its divisors is an integer number (3403156).

Almost surely, 2^11911039 is an apocalyptic number.

11911039 is a deficient number, since it is larger than the sum of its proper divisors (1701585).

11911039 is an equidigital number, since it uses as much as digits as its factorization.

11911039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701584.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 11911039 is about 3451.2373143555. The cubic root of 11911039 is about 228.3756951020.

The spelling of 11911039 in words is "eleven million, nine hundred eleven thousand, thirty-nine".