13680599 has 4 divisors (see below), whose sum is σ = 13738080. Its totient is φ = 13623120.

The previous prime is 13680587. The next prime is 13680613. The reversal of 13680599 is 99508631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13680599 is a prime.

It is a super-3 number, since 3×13680599³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13680539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28382 + ... + 28859.

It is an arithmetic number, because the mean of its divisors is an integer number (3434520).

Almost surely, 2^13680599 is an apocalyptic number.

13680599 is a deficient number, since it is larger than the sum of its proper divisors (57481).

13680599 is an equidigital number, since it uses as much as digits as its factorization.

13680599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57480.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 13680599 is about 3698.7293764210. The cubic root of 13680599 is about 239.1672469537.

The spelling of 13680599 in words is "thirteen million, six hundred eighty thousand, five hundred ninety-nine".