13845439 has 2 divisors, whose sum is σ = 13845440. Its totient is φ = 13845438.

The previous prime is 13845431. The next prime is 13845443. The reversal of 13845439 is 93454831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13845439 - 2³ = 13845431 is a prime.

It is a super-2 number, since 2×13845439² = 383392362205442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13845398 and 13845407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13845431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6922719 + 6922720.

It is an arithmetic number, because the mean of its divisors is an integer number (6922720).

Almost surely, 2^13845439 is an apocalyptic number.

13845439 is a deficient number, since it is larger than the sum of its proper divisors (1).

13845439 is an equidigital number, since it uses as much as digits as its factorization.

13845439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 13845439 is about 3720.9459818707. The cubic root of 13845439 is about 240.1240042050.

The spelling of 13845439 in words is "thirteen million, eight hundred forty-five thousand, four hundred thirty-nine".