13639289 has 2 divisors, whose sum is σ = 13639290. Its totient is φ = 13639288.

The previous prime is 13639277. The next prime is 13639303. The reversal of 13639289 is 98293631.

13639289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8952064 + 4687225 = 2992^2 + 2165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13639289 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 11.

It is not a weakly prime, because it can be changed into another prime (13639229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6819644 + 6819645.

It is an arithmetic number, because the mean of its divisors is an integer number (6819645).

Almost surely, 2^13639289 is an apocalyptic number.

It is an amenable number.

13639289 is a deficient number, since it is larger than the sum of its proper divisors (1).

13639289 is an equidigital number, since it uses as much as digits as its factorization.

13639289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 13639289 is about 3693.1408042478. The cubic root of 13639289 is about 238.9262740681.

The spelling of 13639289 in words is "thirteen million, six hundred thirty-nine thousand, two hundred eighty-nine".