11919965 has 16 divisors (see below), whose sum is σ = 15054336. Its totient is φ = 9048000.

The previous prime is 11919953. The next prime is 11919967. The reversal of 11919965 is 56991911.

It is not a de Polignac number, because 11919965 - 2⁸ = 11919709 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 (11919967) 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, 7490 + ... + 8940.

It is an arithmetic number, because the mean of its divisors is an integer number (940896).

Almost surely, 2^11919965 is an apocalyptic number.

It is an amenable number.

11919965 is a deficient number, since it is larger than the sum of its proper divisors (3134371).

11919965 is a wasteful number, since it uses less digits than its factorization.

11919965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540.

The product of its digits is 21870, while the sum is 41.

The square root of 11919965 is about 3452.5302315838. The cubic root of 11919965 is about 228.4327282587.

The spelling of 11919965 in words is "eleven million, nine hundred nineteen thousand, nine hundred sixty-five".