13489985 has 4 divisors (see below), whose sum is σ = 16187988. Its totient is φ = 10791984.

The previous prime is 13489963. The next prime is 13490023. The reversal of 13489985 is 58998431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58998431 = 2081 ⋅28351.

It can be written as a sum of positive squares in 2 ways, for example, as 6270016 + 7219969 = 2504^2 + 2687^2 .

It is a cyclic number.

It is not a de Polignac number, because 13489985 - 2⁶ = 13489921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348994 + ... + 1349003.

It is an arithmetic number, because the mean of its divisors is an integer number (4046997).

Almost surely, 2^13489985 is an apocalyptic number.

It is an amenable number.

13489985 is a deficient number, since it is larger than the sum of its proper divisors (2698003).

13489985 is an equidigital number, since it uses as much as digits as its factorization.

13489985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698002.

The product of its digits is 311040, while the sum is 47.

The square root of 13489985 is about 3672.8714924429. The cubic root of 13489985 is about 238.0512624084.

The spelling of 13489985 in words is "thirteen million, four hundred eighty-nine thousand, nine hundred eighty-five".