13998663 has 30 divisors (see below), whose sum is σ = 24332616. Its totient is φ = 7996968.

The previous prime is 13998659. The next prime is 13998679. The reversal of 13998663 is 36689931.

It is not a de Polignac number, because 13998663 - 2² = 13998659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13998613) 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 29 ways as a sum of consecutive naturals, for example, 2206 + ... + 5732.

Almost surely, 2^13998663 is an apocalyptic number.

13998663 is a deficient number, since it is larger than the sum of its proper divisors (10333953).

13998663 is an equidigital number, since it uses as much as digits as its factorization.

13998663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553 (or 3537 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 13998663 is about 3741.4787183679. The cubic root of 13998663 is about 241.0065538871.

The spelling of 13998663 in words is "thirteen million, nine hundred ninety-eight thousand, six hundred sixty-three".