11965899 has 16 divisors (see below), whose sum is σ = 17464320. Its totient is φ = 7227360.

The previous prime is 11965883. The next prime is 11965901. The reversal of 11965899 is 99856911.

It is not a de Polignac number, because 11965899 - 2⁴ = 11965883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11965879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15429 + ... + 16185.

It is an arithmetic number, because the mean of its divisors is an integer number (1091520).

Almost surely, 2^11965899 is an apocalyptic number.

11965899 is a deficient number, since it is larger than the sum of its proper divisors (5498421).

11965899 is a wasteful number, since it uses less digits than its factorization.

11965899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250.

The product of its digits is 174960, while the sum is 48.

The square root of 11965899 is about 3459.1760579652. The cubic root of 11965899 is about 228.7257766461.

The spelling of 11965899 in words is "eleven million, nine hundred sixty-five thousand, eight hundred ninety-nine".