13839569 has 2 divisors, whose sum is σ = 13839570. Its totient is φ = 13839568.

The previous prime is 13839557. The next prime is 13839577. The reversal of 13839569 is 96593831.

13839569 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., 8340544 + 5499025 = 2888^2 + 2345^2 .

It is an emirp because it is prime and its reverse (96593831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13839569 - 2¹² = 13835473 is a prime.

It is a super-2 number, since 2×13839569² = 383067340211522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13839599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6919784 + 6919785.

It is an arithmetic number, because the mean of its divisors is an integer number (6919785).

Almost surely, 2^13839569 is an apocalyptic number.

It is an amenable number.

13839569 is a deficient number, since it is larger than the sum of its proper divisors (1).

13839569 is an equidigital number, since it uses as much as digits as its factorization.

13839569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 13839569 is about 3720.1571203378. The cubic root of 13839569 is about 240.0900645770.

The spelling of 13839569 in words is "thirteen million, eight hundred thirty-nine thousand, five hundred sixty-nine".