13578889 has 4 divisors (see below), whose sum is σ = 13945924. Its totient is φ = 13211856.

The previous prime is 13578857. The next prime is 13578919. The reversal of 13578889 is 98887531.

13578889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11868025 + 1710864 = 3445^2 + 1308^2 .

It is a cyclic number.

It is not a de Polignac number, because 13578889 - 2⁵ = 13578857 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 (13578839) 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, 183462 + ... + 183535.

It is an arithmetic number, because the mean of its divisors is an integer number (3486481).

Almost surely, 2^13578889 is an apocalyptic number.

It is an amenable number.

13578889 is a deficient number, since it is larger than the sum of its proper divisors (367035).

13578889 is an equidigital number, since it uses as much as digits as its factorization.

13578889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367034.

The product of its digits is 483840, while the sum is 49.

The square root of 13578889 is about 3684.9544094873. The cubic root of 13578889 is about 238.5730664649.

The spelling of 13578889 in words is "thirteen million, five hundred seventy-eight thousand, eight hundred eighty-nine".