13636985 has 8 divisors (see below), whose sum is σ = 16433736. Its totient is φ = 10863360.

The previous prime is 13636981. The next prime is 13637011. The reversal of 13636985 is 58963631.

It can be written as a sum of positive squares in 4 ways, for example, as 6497401 + 7139584 = 2549^2 + 2672^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13636985 - 2² = 13636981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13636981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4454 + ... + 6863.

It is an arithmetic number, because the mean of its divisors is an integer number (2054217).

Almost surely, 2^13636985 is an apocalyptic number.

It is an amenable number.

13636985 is a deficient number, since it is larger than the sum of its proper divisors (2796751).

13636985 is a wasteful number, since it uses less digits than its factorization.

13636985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11563.

The product of its digits is 116640, while the sum is 41.

The square root of 13636985 is about 3692.8288614557. The cubic root of 13636985 is about 238.9128198689.

The spelling of 13636985 in words is "thirteen million, six hundred thirty-six thousand, nine hundred eighty-five".