13663949 has 8 divisors (see below), whose sum is σ = 14794752. Its totient is φ = 12544560.

The previous prime is 13663943. The next prime is 13663957. The reversal of 13663949 is 94936631.

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 13663949 - 2⁴ = 13663933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13663943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269 + ... + 5234.

It is an arithmetic number, because the mean of its divisors is an integer number (1849344).

Almost surely, 2^13663949 is an apocalyptic number.

It is an amenable number.

13663949 is a deficient number, since it is larger than the sum of its proper divisors (1130803).

13663949 is a wasteful number, since it uses less digits than its factorization.

13663949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5707.

The product of its digits is 104976, while the sum is 41.

The square root of 13663949 is about 3696.4779182351. The cubic root of 13663949 is about 239.0701812418.

The spelling of 13663949 in words is "thirteen million, six hundred sixty-three thousand, nine hundred forty-nine".