13623559 has 2 divisors, whose sum is σ = 13623560. Its totient is φ = 13623558.

The previous prime is 13623541. The next prime is 13623563. The reversal of 13623559 is 95532631.

It is a happy number.

13623559 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13623559 - 2⁷ = 13623431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13623509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6811779 + 6811780.

It is an arithmetic number, because the mean of its divisors is an integer number (6811780).

Almost surely, 2^13623559 is an apocalyptic number.

13623559 is a deficient number, since it is larger than the sum of its proper divisors (1).

13623559 is an equidigital number, since it uses as much as digits as its factorization.

13623559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 34.

The square root of 13623559 is about 3691.0105662271. The cubic root of 13623559 is about 238.8343886329.

The spelling of 13623559 in words is "thirteen million, six hundred twenty-three thousand, five hundred fifty-nine".