13201663 has 4 divisors (see below), whose sum is σ = 13425480. Its totient is φ = 12977848.

The previous prime is 13201651. The next prime is 13201679. The reversal of 13201663 is 36610231.

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

It is a cyclic number.

It is not a de Polignac number, because 13201663 - 2¹³ = 13193471 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 (13201633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111820 + ... + 111937.

It is an arithmetic number, because the mean of its divisors is an integer number (3356370).

Almost surely, 2^13201663 is an apocalyptic number.

13201663 is a deficient number, since it is larger than the sum of its proper divisors (223817).

13201663 is an equidigital number, since it uses as much as digits as its factorization.

13201663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223816.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 13201663 is about 3633.4092805518. The cubic root of 13201663 is about 236.3430744754.

Adding to 13201663 its reverse (36610231), we get a palindrome (49811894).

The spelling of 13201663 in words is "thirteen million, two hundred one thousand, six hundred sixty-three".