13859647 has 2 divisors, whose sum is σ = 13859648. Its totient is φ = 13859646.

The previous prime is 13859623. The next prime is 13859653. The reversal of 13859647 is 74695831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13859647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13859047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6929823 + 6929824.

It is an arithmetic number, because the mean of its divisors is an integer number (6929824).

Almost surely, 2^13859647 is an apocalyptic number.

13859647 is a deficient number, since it is larger than the sum of its proper divisors (1).

13859647 is an equidigital number, since it uses as much as digits as its factorization.

13859647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 13859647 is about 3722.8546842443. The cubic root of 13859647 is about 240.2061134471.

The spelling of 13859647 in words is "thirteen million, eight hundred fifty-nine thousand, six hundred forty-seven".