11399965 has 4 divisors (see below), whose sum is σ = 13679964. Its totient is φ = 9119968.

The previous prime is 11399957. The next prime is 11399977. The reversal of 11399965 is 56999311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8637721 + 2762244 = 2939^2 + 1662^2 .

It is a cyclic number.

It is not a de Polignac number, because 11399965 - 2³ = 11399957 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, 1139992 + ... + 1140001.

It is an arithmetic number, because the mean of its divisors is an integer number (3419991).

Almost surely, 2^11399965 is an apocalyptic number.

It is an amenable number.

11399965 is a deficient number, since it is larger than the sum of its proper divisors (2279999).

11399965 is an equidigital number, since it uses as much as digits as its factorization.

11399965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279998.

The product of its digits is 65610, while the sum is 43.

The square root of 11399965 is about 3376.3834201702. The cubic root of 11399965 is about 225.0614811412.

The spelling of 11399965 in words is "eleven million, three hundred ninety-nine thousand, nine hundred sixty-five".