13601663 has 4 divisors (see below), whose sum is σ = 14317560. Its totient is φ = 12885768.

The previous prime is 13601647. The next prime is 13601689. The reversal of 13601663 is 36610631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36610631 = 269 ⋅136099.

It is a cyclic number.

It is not a de Polignac number, because 13601663 - 2⁴ = 13601647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13601633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357920 + ... + 357957.

It is an arithmetic number, because the mean of its divisors is an integer number (3579390).

Almost surely, 2^13601663 is an apocalyptic number.

13601663 is a deficient number, since it is larger than the sum of its proper divisors (715897).

13601663 is an equidigital number, since it uses as much as digits as its factorization.

13601663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715896.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 13601663 is about 3688.0432481195. The cubic root of 13601663 is about 238.7063672171.

The spelling of 13601663 in words is "thirteen million, six hundred one thousand, six hundred sixty-three".