13206649 has 8 divisors (see below), whose sum is σ = 13514472. Its totient is φ = 12902400.

The previous prime is 13206631. The next prime is 13206679. The reversal of 13206649 is 94660231.

It can be written as a sum of positive squares in 4 ways, for example, as 2689600 + 10517049 = 1640^2 + 3243^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13206649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13206649.

It is not an unprimeable number, because it can be changed into a prime (13206679) 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, 7449 + ... + 9049.

It is an arithmetic number, because the mean of its divisors is an integer number (1689309).

Almost surely, 2^13206649 is an apocalyptic number.

It is an amenable number.

13206649 is a deficient number, since it is larger than the sum of its proper divisors (307823).

13206649 is a wasteful number, since it uses less digits than its factorization.

13206649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1787.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 13206649 is about 3634.0953482263. The cubic root of 13206649 is about 236.3728247235.

The spelling of 13206649 in words is "thirteen million, two hundred six thousand, six hundred forty-nine".