13938559 has 2 divisors, whose sum is σ = 13938560. Its totient is φ = 13938558.

The previous prime is 13938553. The next prime is 13938577. The reversal of 13938559 is 95583931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13938559 - 2⁵ = 13938527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13938553) 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, 6969279 + 6969280.

It is an arithmetic number, because the mean of its divisors is an integer number (6969280).

Almost surely, 2^13938559 is an apocalyptic number.

13938559 is a deficient number, since it is larger than the sum of its proper divisors (1).

13938559 is an equidigital number, since it uses as much as digits as its factorization.

13938559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 43.

The square root of 13938559 is about 3733.4379598434. The cubic root of 13938559 is about 240.6611342598.

The spelling of 13938559 in words is "thirteen million, nine hundred thirty-eight thousand, five hundred fifty-nine".