13645169 has 8 divisors (see below), whose sum is σ = 14800968. Its totient is φ = 12528640.

The previous prime is 13645157. The next prime is 13645171. The reversal of 13645169 is 96154631.

It can be written as a sum of positive squares in 4 ways, for example, as 3564544 + 10080625 = 1888^2 + 3175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13645169 - 2⁸ = 13644913 is a prime.

It is a super-2 number, since 2×13645169² = 372381274077122, 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 (13645469) 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 7 ways as a sum of consecutive naturals, for example, 9092 + ... + 10485.

It is an arithmetic number, because the mean of its divisors is an integer number (1850121).

Almost surely, 2^13645169 is an apocalyptic number.

It is an amenable number.

13645169 is a deficient number, since it is larger than the sum of its proper divisors (1155799).

13645169 is a wasteful number, since it uses less digits than its factorization.

13645169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19635.

The product of its digits is 19440, while the sum is 35.

The square root of 13645169 is about 3693.9367888474. The cubic root of 13645169 is about 238.9606034396.

The spelling of 13645169 in words is "thirteen million, six hundred forty-five thousand, one hundred sixty-nine".