13664029 has 4 divisors (see below), whose sum is σ = 13997340. Its totient is φ = 13330720.

The previous prime is 13663999. The next prime is 13664069. The reversal of 13664029 is 92046631.

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 1428025 + 12236004 = 1195^2 + 3498^2 .

It is a cyclic number.

It is not a de Polignac number, because 13664029 - 2⁵ = 13663997 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13664069) 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, 166594 + ... + 166675.

It is an arithmetic number, because the mean of its divisors is an integer number (3499335).

Almost surely, 2^13664029 is an apocalyptic number.

It is an amenable number.

13664029 is a deficient number, since it is larger than the sum of its proper divisors (333311).

13664029 is an equidigital number, since it uses as much as digits as its factorization.

13664029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333310.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 13664029 is about 3696.4887393309. The cubic root of 13664029 is about 239.0706478121.

The spelling of 13664029 in words is "thirteen million, six hundred sixty-four thousand, twenty-nine".