13604645 has 8 divisors (see below), whose sum is σ = 16549656. Its totient is φ = 10734336.

The previous prime is 13604639. The next prime is 13604653. The reversal of 13604645 is 54640631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3094081 + 10510564 = 1759^2 + 3242^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13604645 - 2⁸ = 13604389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18272 + ... + 19001.

It is an arithmetic number, because the mean of its divisors is an integer number (2068707).

Almost surely, 2^13604645 is an apocalyptic number.

It is an amenable number.

13604645 is a deficient number, since it is larger than the sum of its proper divisors (2945011).

13604645 is an equidigital number, since it uses as much as digits as its factorization.

13604645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37351.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 13604645 is about 3688.4475053876. The cubic root of 13604645 is about 238.7238104365.

The spelling of 13604645 in words is "thirteen million, six hundred four thousand, six hundred forty-five".