13388789 has 4 divisors (see below), whose sum is σ = 13419456. Its totient is φ = 13358124.

The previous prime is 13388779. The next prime is 13388801. The reversal of 13388789 is 98788331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98788331 = 223 ⋅442997.

It is a cyclic number.

It is not a de Polignac number, because 13388789 - 2⁴ = 13388773 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 (13388719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14669 + ... + 15554.

It is an arithmetic number, because the mean of its divisors is an integer number (3354864).

Almost surely, 2^13388789 is an apocalyptic number.

It is an amenable number.

13388789 is a deficient number, since it is larger than the sum of its proper divisors (30667).

13388789 is an equidigital number, since it uses as much as digits as its factorization.

13388789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30666.

The product of its digits is 290304, while the sum is 47.

The square root of 13388789 is about 3659.0694172153. The cubic root of 13388789 is about 237.4545153893.

The spelling of 13388789 in words is "thirteen million, three hundred eighty-eight thousand, seven hundred eighty-nine".