13445669 has 4 divisors (see below), whose sum is σ = 13453344. Its totient is φ = 13437996.

The previous prime is 13445659. The next prime is 13445683. The reversal of 13445669 is 96654431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96654431 = 607 ⋅159233.

It is a cyclic number.

It is not a de Polignac number, because 13445669 - 2²⁰ = 12397093 is a prime.

It is a super-2 number, since 2×13445669² = 361572029715122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13445629) 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, 224 + ... + 5190.

It is an arithmetic number, because the mean of its divisors is an integer number (3363336).

Almost surely, 2^13445669 is an apocalyptic number.

It is an amenable number.

13445669 is a deficient number, since it is larger than the sum of its proper divisors (7675).

13445669 is an equidigital number, since it uses as much as digits as its factorization.

13445669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7674.

The product of its digits is 77760, while the sum is 38.

The square root of 13445669 is about 3666.8336477130. The cubic root of 13445669 is about 237.7903020758.

The spelling of 13445669 in words is "thirteen million, four hundred forty-five thousand, six hundred sixty-nine".