13663669 has 4 divisors (see below), whose sum is σ = 14134860. Its totient is φ = 13192480.

The previous prime is 13663667. The next prime is 13663673. The reversal of 13663669 is 96636631.

13663669 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11135569 + 2528100 = 3337^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 13663669 - 2¹ = 13663667 is a prime.

It is a super-2 number, since 2×13663669² = 373391701083122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13663667) 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, 235552 + ... + 235609.

It is an arithmetic number, because the mean of its divisors is an integer number (3533715).

Almost surely, 2^13663669 is an apocalyptic number.

It is an amenable number.

13663669 is a deficient number, since it is larger than the sum of its proper divisors (471191).

13663669 is an equidigital number, since it uses as much as digits as its factorization.

13663669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471190.

The product of its digits is 104976, while the sum is 40.

The square root of 13663669 is about 3696.4400441506. The cubic root of 13663669 is about 239.0685482315.

The spelling of 13663669 in words is "thirteen million, six hundred sixty-three thousand, six hundred sixty-nine".