11898009 has 28 divisors (see below), whose sum is σ = 18799600. Its totient is φ = 7505784.

The previous prime is 11898001. The next prime is 11898013. The reversal of 11898009 is 90089811.

11898009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11898009 - 2³ = 11898001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11898001) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 13422 + ... + 14280.

Almost surely, 2^11898009 is an apocalyptic number.

11898009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11898009 is a deficient number, since it is larger than the sum of its proper divisors (6901591).

11898009 is an frugal number, since it uses more digits than its factorization.

11898009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 11898009 is about 3449.3490690274. The cubic root of 11898009 is about 228.2923880381.

The spelling of 11898009 in words is "eleven million, eight hundred ninety-eight thousand, nine".