11918489 has 8 divisors (see below), whose sum is σ = 13079232. Its totient is φ = 10770640.

The previous prime is 11918471. The next prime is 11918503. The reversal of 11918489 is 98481911.

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 11918489 - 2²⁰ = 10869913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11918419) 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, 1229 + ... + 5034.

It is an arithmetic number, because the mean of its divisors is an integer number (1634904).

Almost surely, 2^11918489 is an apocalyptic number.

It is an amenable number.

11918489 is a deficient number, since it is larger than the sum of its proper divisors (1160743).

11918489 is a wasteful number, since it uses less digits than its factorization.

11918489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6447.

The product of its digits is 20736, while the sum is 41.

The square root of 11918489 is about 3452.3164686917. The cubic root of 11918489 is about 228.4232992427.

The spelling of 11918489 in words is "eleven million, nine hundred eighteen thousand, four hundred eighty-nine".