11439965 has 4 divisors (see below), whose sum is σ = 13727964. Its totient is φ = 9151968.

The previous prime is 11439959. The next prime is 11439977. The reversal of 11439965 is 56993411.

11439965 is digitally balanced in base 3, 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: 56993411 = 5821 ⋅9791.

It can be written as a sum of positive squares in 2 ways, for example, as 8886361 + 2553604 = 2981^2 + 1598^2 .

It is a cyclic number.

It is not a de Polignac number, because 11439965 - 2¹⁰ = 11438941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143992 + ... + 1144001.

It is an arithmetic number, because the mean of its divisors is an integer number (3431991).

Almost surely, 2^11439965 is an apocalyptic number.

It is an amenable number.

11439965 is a deficient number, since it is larger than the sum of its proper divisors (2287999).

11439965 is an equidigital number, since it uses as much as digits as its factorization.

11439965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287998.

The product of its digits is 29160, while the sum is 38.

The square root of 11439965 is about 3382.3017310701. The cubic root of 11439965 is about 225.3244044776.

The spelling of 11439965 in words is "eleven million, four hundred thirty-nine thousand, nine hundred sixty-five".