13818897 has 8 divisors (see below), whose sum is σ = 20472480. Its totient is φ = 9212580.

The previous prime is 13818887. The next prime is 13818907. The reversal of 13818897 is 79881831.

It is an interprime number because it is at equal distance from previous prime (13818887) and next prime (13818907).

It is not a de Polignac number, because 13818897 - 2⁷ = 13818769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13818887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255879 + ... + 255932.

It is an arithmetic number, because the mean of its divisors is an integer number (2559060).

Almost surely, 2^13818897 is an apocalyptic number.

It is an amenable number.

13818897 is a deficient number, since it is larger than the sum of its proper divisors (6653583).

13818897 is an equidigital number, since it uses as much as digits as its factorization.

13818897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511820 (or 511814 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 13818897 is about 3717.3777047806. The cubic root of 13818897 is about 239.9704651155.

The spelling of 13818897 in words is "thirteen million, eight hundred eighteen thousand, eight hundred ninety-seven".