13855559 has 2 divisors, whose sum is σ = 13855560. Its totient is φ = 13855558.

The previous prime is 13855549. The next prime is 13855607. The reversal of 13855559 is 95555831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13855559 - 2¹² = 13851463 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13855519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6927779 + 6927780.

It is an arithmetic number, because the mean of its divisors is an integer number (6927780).

Almost surely, 2^13855559 is an apocalyptic number.

13855559 is a deficient number, since it is larger than the sum of its proper divisors (1).

13855559 is an equidigital number, since it uses as much as digits as its factorization.

13855559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 41.

The square root of 13855559 is about 3722.3056027145. The cubic root of 13855559 is about 240.1824942993.

The spelling of 13855559 in words is "thirteen million, eight hundred fifty-five thousand, five hundred fifty-nine".