13788889 has 4 divisors (see below), whose sum is σ = 14514640. Its totient is φ = 13063140.

The previous prime is 13788881. The next prime is 13788911. The reversal of 13788889 is 98888731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13788889 - 2³ = 13788881 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (13788881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362847 + ... + 362884.

It is an arithmetic number, because the mean of its divisors is an integer number (3628660).

Almost surely, 2^13788889 is an apocalyptic number.

13788889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13788889 is a deficient number, since it is larger than the sum of its proper divisors (725751).

13788889 is an equidigital number, since it uses as much as digits as its factorization.

13788889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725750.

The product of its digits is 774144, while the sum is 52.

The square root of 13788889 is about 3713.3393327300. The cubic root of 13788889 is about 239.7966390760.

The spelling of 13788889 in words is "thirteen million, seven hundred eighty-eight thousand, eight hundred eighty-nine".