13680539 has 2 divisors, whose sum is σ = 13680540. Its totient is φ = 13680538.

The previous prime is 13680479. The next prime is 13680553. The reversal of 13680539 is 93508631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13680539 - 2²⁰ = 12631963 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13680499 and 13680508.

It is not a weakly prime, because it can be changed into another prime (13680559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6840269 + 6840270.

It is an arithmetic number, because the mean of its divisors is an integer number (6840270).

Almost surely, 2^13680539 is an apocalyptic number.

13680539 is a deficient number, since it is larger than the sum of its proper divisors (1).

13680539 is an equidigital number, since it uses as much as digits as its factorization.

13680539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 13680539 is about 3698.7212655187. The cubic root of 13680539 is about 239.1668973088.

The spelling of 13680539 in words is "thirteen million, six hundred eighty thousand, five hundred thirty-nine".