13669569 has 12 divisors (see below), whose sum is σ = 20784400. Its totient is φ = 8633304.

The previous prime is 13669553. The next prime is 13669583. The reversal of 13669569 is 96596631.

It is not a de Polignac number, because 13669569 - 2⁴ = 13669553 is a prime.

It is a super-2 number, since 2×13669569² = 373714233291522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13669529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39799 + ... + 40140.

Almost surely, 2^13669569 is an apocalyptic number.

13669569 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13669569 is a deficient number, since it is larger than the sum of its proper divisors (7114831).

13669569 is a wasteful number, since it uses less digits than its factorization.

13669569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79964 (or 79961 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 13669569 is about 3697.2380231735. The cubic root of 13669569 is about 239.1029533747.

The spelling of 13669569 in words is "thirteen million, six hundred sixty-nine thousand, five hundred sixty-nine".