13649565 has 8 divisors (see below), whose sum is σ = 21839328. Its totient is φ = 7279760.

The previous prime is 13649563. The next prime is 13649593. The reversal of 13649565 is 56594631.

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

It is not a de Polignac number, because 13649565 - 2¹ = 13649563 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13649561) 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, 454971 + ... + 455000.

It is an arithmetic number, because the mean of its divisors is an integer number (2729916).

Almost surely, 2^13649565 is an apocalyptic number.

13649565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13649565 is a deficient number, since it is larger than the sum of its proper divisors (8189763).

13649565 is an equidigital number, since it uses as much as digits as its factorization.

13649565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909979.

The product of its digits is 97200, while the sum is 39.

The square root of 13649565 is about 3694.5317700623. The cubic root of 13649565 is about 238.9862622893.

The spelling of 13649565 in words is "thirteen million, six hundred forty-nine thousand, five hundred sixty-five".