13663403 has 8 divisors (see below), whose sum is σ = 15354528. Its totient is φ = 12063744.

The previous prime is 13663399. The next prime is 13663423. The reversal of 13663403 is 30436631.

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

It is a cyclic number.

It is not a de Polignac number, because 13663403 - 2² = 13663399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13663423) 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 7 ways as a sum of consecutive naturals, for example, 22550 + ... + 23147.

It is an arithmetic number, because the mean of its divisors is an integer number (1919316).

Almost surely, 2^13663403 is an apocalyptic number.

13663403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13663403 is a deficient number, since it is larger than the sum of its proper divisors (1691125).

13663403 is a wasteful number, since it uses less digits than its factorization.

13663403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45733.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 13663403 is about 3696.4040634108. The cubic root of 13663403 is about 239.0669968511.

The spelling of 13663403 in words is "thirteen million, six hundred sixty-three thousand, four hundred three".