13609889 has 2 divisors, whose sum is σ = 13609890. Its totient is φ = 13609888.

The previous prime is 13609873. The next prime is 13609927. The reversal of 13609889 is 98890631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7656289 + 5953600 = 2767^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 13609889 - 2⁴ = 13609873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13609819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6804944 + 6804945.

It is an arithmetic number, because the mean of its divisors is an integer number (6804945).

Almost surely, 2^13609889 is an apocalyptic number.

It is an amenable number.

13609889 is a deficient number, since it is larger than the sum of its proper divisors (1).

13609889 is an equidigital number, since it uses as much as digits as its factorization.

13609889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 13609889 is about 3689.1583050880. The cubic root of 13609889 is about 238.7544790512.

The spelling of 13609889 in words is "thirteen million, six hundred nine thousand, eight hundred eighty-nine".