47853809 has 2 divisors, whose sum is σ = 47853810. Its totient is φ = 47853808.

The previous prime is 47853791. The next prime is 47853821. The reversal of 47853809 is 90835874.

47853809 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., 24039409 + 23814400 = 4903^2 + 4880^2 .

It is a cyclic number.

It is not a de Polignac number, because 47853809 - 2²⁴ = 31076593 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47853809.

It is not a weakly prime, because it can be changed into another prime (47853889) 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, 23926904 + 23926905.

It is an arithmetic number, because the mean of its divisors is an integer number (23926905).

Almost surely, 2^47853809 is an apocalyptic number.

It is an amenable number.

47853809 is a deficient number, since it is larger than the sum of its proper divisors (1).

47853809 is an equidigital number, since it uses as much as digits as its factorization.

47853809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 47853809 is about 6917.6447581529. The cubic root of 47853809 is about 363.0547896464.

The spelling of 47853809 in words is "forty-seven million, eight hundred fifty-three thousand, eight hundred nine".