543682409 has 2 divisors, whose sum is σ = 543682410. Its totient is φ = 543682408.

The previous prime is 543682387. The next prime is 543682439. The reversal of 543682409 is 904286345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 442176784 + 101505625 = 21028^2 + 10075^2 .

It is a cyclic number.

It is not a de Polignac number, because 543682409 - 2²⁸ = 275246953 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (543682439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271841204 + 271841205.

It is an arithmetic number, because the mean of its divisors is an integer number (271841205).

Almost surely, 2^543682409 is an apocalyptic number.

It is an amenable number.

543682409 is a deficient number, since it is larger than the sum of its proper divisors (1).

543682409 is an equidigital number, since it uses as much as digits as its factorization.

543682409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 543682409 is about 23316.9982845134. The cubic root of 543682409 is about 816.1721295416.

The spelling of 543682409 in words is "five hundred forty-three million, six hundred eighty-two thousand, four hundred nine".