13579985 has 4 divisors (see below), whose sum is σ = 16295988. Its totient is φ = 10863984.

The previous prime is 13579967. The next prime is 13579997. The reversal of 13579985 is 58997531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58997531 = 17 ⋅3470443.

It can be written as a sum of positive squares in 2 ways, for example, as 5650129 + 7929856 = 2377^2 + 2816^2 .

It is a cyclic number.

It is not a de Polignac number, because 13579985 - 2⁶ = 13579921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1357994 + ... + 1358003.

It is an arithmetic number, because the mean of its divisors is an integer number (4073997).

Almost surely, 2^13579985 is an apocalyptic number.

It is an amenable number.

13579985 is a deficient number, since it is larger than the sum of its proper divisors (2716003).

13579985 is an equidigital number, since it uses as much as digits as its factorization.

13579985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716002.

The product of its digits is 340200, while the sum is 47.

The square root of 13579985 is about 3685.1031193170. The cubic root of 13579985 is about 238.5794849833.

The spelling of 13579985 in words is "thirteen million, five hundred seventy-nine thousand, nine hundred eighty-five".