13085999 has 4 divisors (see below), whose sum is σ = 13508160. Its totient is φ = 12663840.

The previous prime is 13085987. The next prime is 13086019. The reversal of 13085999 is 99958031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99958031 = 19 ⋅5260949.

It is a cyclic number.

It is not a de Polignac number, because 13085999 - 2¹² = 13081903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13085299) 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, 211034 + ... + 211095.

It is an arithmetic number, because the mean of its divisors is an integer number (3377040).

Almost surely, 2^13085999 is an apocalyptic number.

13085999 is a deficient number, since it is larger than the sum of its proper divisors (422161).

13085999 is an equidigital number, since it uses as much as digits as its factorization.

13085999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422160.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 13085999 is about 3617.4575325773. The cubic root of 13085999 is about 235.6508230393.

The spelling of 13085999 in words is "thirteen million, eighty-five thousand, nine hundred ninety-nine".