13408663 has 4 divisors (see below), whose sum is σ = 13467960. Its totient is φ = 13349368.

The previous prime is 13408639. The next prime is 13408669. The reversal of 13408663 is 36680431.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13408663 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13408669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29308 + ... + 29761.

It is an arithmetic number, because the mean of its divisors is an integer number (3366990).

Almost surely, 2^13408663 is an apocalyptic number.

13408663 is a deficient number, since it is larger than the sum of its proper divisors (59297).

13408663 is an equidigital number, since it uses as much as digits as its factorization.

13408663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59296.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 13408663 is about 3661.7841279901. The cubic root of 13408663 is about 237.5719479158.

The spelling of 13408663 in words is "thirteen million, four hundred eight thousand, six hundred sixty-three".