13764409 has 2 divisors, whose sum is σ = 13764410. Its totient is φ = 13764408.

The previous prime is 13764391. The next prime is 13764431. The reversal of 13764409 is 90446731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9784384 + 3980025 = 3128^2 + 1995^2 .

It is a cyclic number.

It is not a de Polignac number, because 13764409 - 2¹³ = 13756217 is a prime.

It is not a weakly prime, because it can be changed into another prime (13764469) 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, 6882204 + 6882205.

It is an arithmetic number, because the mean of its divisors is an integer number (6882205).

Almost surely, 2^13764409 is an apocalyptic number.

It is an amenable number.

13764409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13764409 is an equidigital number, since it uses as much as digits as its factorization.

13764409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 13764409 is about 3710.0416439711. The cubic root of 13764409 is about 239.6546479642.

It can be divided in two parts, 137 and 64409, that added together give a palindrome (64546).

The spelling of 13764409 in words is "thirteen million, seven hundred sixty-four thousand, four hundred nine".