11918965 has 16 divisors (see below), whose sum is σ = 14844672. Its totient is φ = 9180864.

The previous prime is 11918941. The next prime is 11918981. The reversal of 11918965 is 56981911.

It is a cyclic number.

It is not a de Polignac number, because 11918965 - 2¹¹ = 11916917 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 15 ways as a sum of consecutive naturals, for example, 15367 + ... + 16123.

It is an arithmetic number, because the mean of its divisors is an integer number (927792).

Almost surely, 2^11918965 is an apocalyptic number.

It is an amenable number.

11918965 is a deficient number, since it is larger than the sum of its proper divisors (2925707).

11918965 is an equidigital number, since it uses as much as digits as its factorization.

11918965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876.

The product of its digits is 19440, while the sum is 40.

The square root of 11918965 is about 3452.3854072221. The cubic root of 11918965 is about 228.4263401215.

The spelling of 11918965 in words is "eleven million, nine hundred eighteen thousand, nine hundred sixty-five".