14991909 has 24 divisors (see below), whose sum is σ = 21790080. Its totient is φ = 9135360.

The previous prime is 14991901. The next prime is 14991913. The reversal of 14991909 is 90919941.

It is not a de Polignac number, because 14991909 - 2³ = 14991901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14991901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189732 + ... + 189810.

It is an arithmetic number, because the mean of its divisors is an integer number (907920).

Almost surely, 2^14991909 is an apocalyptic number.

It is an amenable number.

14991909 is a deficient number, since it is larger than the sum of its proper divisors (6798171).

14991909 is an equidigital number, since it uses as much as digits as its factorization.

14991909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 14991909 is about 3871.9386617042. The cubic root of 14991909 is about 246.5768569648.

The spelling of 14991909 in words is "fourteen million, nine hundred ninety-one thousand, nine hundred nine".