13839557 has 2 divisors, whose sum is σ = 13839558. Its totient is φ = 13839556.

The previous prime is 13839523. The next prime is 13839569. The reversal of 13839557 is 75593831.

It is a happy number.

13839557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12967201 + 872356 = 3601^2 + 934^2 .

It is a cyclic number.

It is not a de Polignac number, because 13839557 - 2⁶ = 13839493 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 (13839577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6919778 + 6919779.

It is an arithmetic number, because the mean of its divisors is an integer number (6919779).

Almost surely, 2^13839557 is an apocalyptic number.

It is an amenable number.

13839557 is a deficient number, since it is larger than the sum of its proper divisors (1).

13839557 is an equidigital number, since it uses as much as digits as its factorization.

13839557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 41.

The square root of 13839557 is about 3720.1555075023. The cubic root of 13839557 is about 240.0899951846.

The spelling of 13839557 in words is "thirteen million, eight hundred thirty-nine thousand, five hundred fifty-seven".