13644769 has 2 divisors, whose sum is σ = 13644770. Its totient is φ = 13644768.

The previous prime is 13644739. The next prime is 13644781. The reversal of 13644769 is 96744631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10627600 + 3017169 = 3260^2 + 1737^2 .

It is an emirp because it is prime and its reverse (96744631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13644769 - 2²¹ = 11547617 is a prime.

It is a super-2 number, since 2×13644769² = 372359442126722, which contains 22 as substring.

It is equal to p₈₈₈₄₆₆ and since 13644769 and 888466 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13644739) 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 as a sum of consecutive naturals, namely, 6822384 + 6822385.

It is an arithmetic number, because the mean of its divisors is an integer number (6822385).

Almost surely, 2^13644769 is an apocalyptic number.

It is an amenable number.

13644769 is a deficient number, since it is larger than the sum of its proper divisors (1).

13644769 is an equidigital number, since it uses as much as digits as its factorization.

13644769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 13644769 is about 3693.8826456724. The cubic root of 13644769 is about 238.9582684208.

The spelling of 13644769 in words is "thirteen million, six hundred forty-four thousand, seven hundred sixty-nine".