13663538 has 8 divisors (see below), whose sum is σ = 23423232. Its totient is φ = 5855796.

The previous prime is 13663501. The next prime is 13663577. The reversal of 13663538 is 83536631.

13663538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 13663498 and 13663507.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487970 + ... + 487997.

It is an arithmetic number, because the mean of its divisors is an integer number (2927904).

Almost surely, 2^13663538 is an apocalyptic number.

13663538 is a deficient number, since it is larger than the sum of its proper divisors (9759694).

13663538 is an equidigital number, since it uses as much as digits as its factorization.

13663538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975976.

The product of its digits is 38880, while the sum is 35.

The square root of 13663538 is about 3696.4223243563. The cubic root of 13663538 is about 239.0677842083.

The spelling of 13663538 in words is "thirteen million, six hundred sixty-three thousand, five hundred thirty-eight".