14818991 has 6 divisors (see below), whose sum is σ = 16288776. Its totient is φ = 13471700.

The previous prime is 14818963. The next prime is 14818997. The reversal of 14818991 is 19981841.

It is not a de Polignac number, because 14818991 - 2¹⁸ = 14556847 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 (14818997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61115 + ... + 61356.

It is an arithmetic number, because the mean of its divisors is an integer number (2714796).

Almost surely, 2^14818991 is an apocalyptic number.

14818991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

14818991 is a deficient number, since it is larger than the sum of its proper divisors (1469785).

14818991 is a wasteful number, since it uses less digits than its factorization.

14818991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122493 (or 122482 counting only the distinct ones).

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

The square root of 14818991 is about 3849.5442587402. The cubic root of 14818991 is about 245.6251755379.

The spelling of 14818991 in words is "fourteen million, eight hundred eighteen thousand, nine hundred ninety-one".