13644469 has 4 divisors (see below), whose sum is σ = 13671180. Its totient is φ = 13617760.

The previous prime is 13644461. The next prime is 13644473. The reversal of 13644469 is 96444631.

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 7700625 + 5943844 = 2775^2 + 2438^2 .

It is a cyclic number.

It is not a de Polignac number, because 13644469 - 2³ = 13644461 is a prime.

It is a super-2 number, since 2×13644469² = 372343068583922, 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 (13644461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12574 + ... + 13615.

It is an arithmetic number, because the mean of its divisors is an integer number (3417795).

Almost surely, 2^13644469 is an apocalyptic number.

It is an amenable number.

13644469 is a deficient number, since it is larger than the sum of its proper divisors (26711).

13644469 is an equidigital number, since it uses as much as digits as its factorization.

13644469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26710.

The product of its digits is 62208, while the sum is 37.

The square root of 13644469 is about 3693.8420377704. The cubic root of 13644469 is about 238.9565171268.

The spelling of 13644469 in words is "thirteen million, six hundred forty-four thousand, four hundred sixty-nine".