11918969 has 8 divisors (see below), whose sum is σ = 12143880. Its totient is φ = 11696256.

The previous prime is 11918941. The next prime is 11918981. The reversal of 11918969 is 96981911.

It can be written as a sum of positive squares in 4 ways, for example, as 270400 + 11648569 = 520^2 + 3413^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11918969 - 2⁸ = 11918713 is a prime.

It is a super-2 number, since 2×11918969² = 284123644045922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11918069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13547 + ... + 14399.

It is an arithmetic number, because the mean of its divisors is an integer number (1517985).

Almost surely, 2^11918969 is an apocalyptic number.

It is an amenable number.

11918969 is a deficient number, since it is larger than the sum of its proper divisors (224911).

11918969 is an equidigital number, since it uses as much as digits as its factorization.

11918969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099.

The product of its digits is 34992, while the sum is 44.

The square root of 11918969 is about 3452.3859865316. The cubic root of 11918969 is about 228.4263656748.

The spelling of 11918969 in words is "eleven million, nine hundred eighteen thousand, nine hundred sixty-nine".