13644539 has 2 divisors, whose sum is σ = 13644540. Its totient is φ = 13644538.

The previous prime is 13644473. The next prime is 13644551. The reversal of 13644539 is 93544631.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13644539 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13644499 and 13644508.

It is not a weakly prime, because it can be changed into another prime (13644569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6822269 + 6822270.

It is an arithmetic number, because the mean of its divisors is an integer number (6822270).

Almost surely, 2^13644539 is an apocalyptic number.

13644539 is a deficient number, since it is larger than the sum of its proper divisors (1).

13644539 is an equidigital number, since it uses as much as digits as its factorization.

13644539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The square root of 13644539 is about 3693.8515129875. The cubic root of 13644539 is about 238.9569257644.

The spelling of 13644539 in words is "thirteen million, six hundred forty-four thousand, five hundred thirty-nine".