47552809 has 2 divisors, whose sum is σ = 47552810. Its totient is φ = 47552808.

The previous prime is 47552717. The next prime is 47552821. The reversal of 47552809 is 90825574.

47552809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46621584 + 931225 = 6828^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 47552809 - 2¹⁵ = 47520041 is a prime.

It is a super-3 number, since 3×47552809³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (47552849) 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, 23776404 + 23776405.

It is an arithmetic number, because the mean of its divisors is an integer number (23776405).

Almost surely, 2^47552809 is an apocalyptic number.

It is an amenable number.

47552809 is a deficient number, since it is larger than the sum of its proper divisors (1).

47552809 is an equidigital number, since it uses as much as digits as its factorization.

47552809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 47552809 is about 6895.8544793231. The cubic root of 47552809 is about 362.2919843420.

The spelling of 47552809 in words is "forty-seven million, five hundred fifty-two thousand, eight hundred nine".