13644473 has 2 divisors, whose sum is σ = 13644474. Its totient is φ = 13644472.

The previous prime is 13644461. The next prime is 13644539. The reversal of 13644473 is 37444631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9535744 + 4108729 = 3088^2 + 2027^2 .

It is a cyclic number.

It is not a de Polignac number, because 13644473 - 2⁴ = 13644457 is a prime.

It is not a weakly prime, because it can be changed into another prime (13644403) 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, 6822236 + 6822237.

It is an arithmetic number, because the mean of its divisors is an integer number (6822237).

Almost surely, 2^13644473 is an apocalyptic number.

It is an amenable number.

13644473 is a deficient number, since it is larger than the sum of its proper divisors (1).

13644473 is an equidigital number, since it uses as much as digits as its factorization.

13644473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 32.

The square root of 13644473 is about 3693.8425792121. The cubic root of 13644473 is about 238.9565404776.

The spelling of 13644473 in words is "thirteen million, six hundred forty-four thousand, four hundred seventy-three".