13604539 has 8 divisors (see below), whose sum is σ = 15513120. Its totient is φ = 11819136.

The previous prime is 13604533. The next prime is 13604587. The reversal of 13604539 is 93540631.

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 13604539 - 2³ = 13604531 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 13604539.

It is not an unprimeable number, because it can be changed into a prime (13604531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30559 + ... + 31000.

It is an arithmetic number, because the mean of its divisors is an integer number (1939140).

Almost surely, 2^13604539 is an apocalyptic number.

13604539 is a deficient number, since it is larger than the sum of its proper divisors (1908581).

13604539 is a wasteful number, since it uses less digits than its factorization.

13604539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61589.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 13604539 is about 3688.4331361704. The cubic root of 13604539 is about 238.7231904328.

The spelling of 13604539 in words is "thirteen million, six hundred four thousand, five hundred thirty-nine".