13653538 has 4 divisors (see below), whose sum is σ = 20480310. Its totient is φ = 6826768.

The previous prime is 13653529. The next prime is 13653539. The reversal of 13653538 is 83535631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7166329 + 6487209 = 2677^2 + 2547^2 .

It is not an unprimeable number, because it can be changed into a prime (13653539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3413383 + ... + 3413386.

Almost surely, 2^13653538 is an apocalyptic number.

13653538 is a deficient number, since it is larger than the sum of its proper divisors (6826772).

13653538 is an equidigital number, since it uses as much as digits as its factorization.

13653538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6826771.

The product of its digits is 32400, while the sum is 34.

The square root of 13653538 is about 3695.0694174805. The cubic root of 13653538 is about 239.0094474070.

The spelling of 13653538 in words is "thirteen million, six hundred fifty-three thousand, five hundred thirty-eight".