13813569 has 48 divisors (see below), whose sum is σ = 25718784. Its totient is φ = 6933600.

The previous prime is 13813567. The next prime is 13813577. The reversal of 13813569 is 96531831.

13813569 = T₂ + T₃ + ... + T₄₃₅.

It is a happy number.

13813569 is a `hidden beast` number, since 13 + 81 + 3 + 569 = 666.

It is not a de Polignac number, because 13813569 - 2¹ = 13813567 is a prime.

It is a super-2 number, since 2×13813569² = 381629377035522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13813561) 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 47 ways as a sum of consecutive naturals, for example, 21162 + ... + 21804.

It is an arithmetic number, because the mean of its divisors is an integer number (535808).

Almost surely, 2^13813569 is an apocalyptic number.

It is an amenable number.

13813569 is a deficient number, since it is larger than the sum of its proper divisors (11905215).

13813569 is a wasteful number, since it uses less digits than its factorization.

13813569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698 (or 695 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 13813569 is about 3716.6610014905. The cubic root of 13813569 is about 239.9396202275.

It can be divided in two parts, 1381 and 3569, that added together give a triangular number (4950 = T₉₉).

The spelling of 13813569 in words is "thirteen million, eight hundred thirteen thousand, five hundred sixty-nine".