5243864809 has 2 divisors, whose sum is σ = 5243864810. Its totient is φ = 5243864808.

The previous prime is 5243864741. The next prime is 5243864833. The reversal of 5243864809 is 9084683425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5115110400 + 128754409 = 71520^2 + 11347^2 .

It is a cyclic number.

It is not a de Polignac number, because 5243864809 - 2¹¹ = 5243862761 is a prime.

It is not a weakly prime, because it can be changed into another prime (5243864839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2621932404 + 2621932405.

It is an arithmetic number, because the mean of its divisors is an integer number (2621932405).

Almost surely, 2^5243864809 is an apocalyptic number.

It is an amenable number.

5243864809 is a deficient number, since it is larger than the sum of its proper divisors (1).

5243864809 is an equidigital number, since it uses as much as digits as its factorization.

5243864809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The square root of 5243864809 is about 72414.5345148334. The cubic root of 5243864809 is about 1737.3360399016.

The spelling of 5243864809 in words is "five billion, two hundred forty-three million, eight hundred sixty-four thousand, eight hundred nine".