47845813 has 2 divisors, whose sum is σ = 47845814. Its totient is φ = 47845812.

The previous prime is 47845801. The next prime is 47845817. The reversal of 47845813 is 31854874.

47845813 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., 45468049 + 2377764 = 6743^2 + 1542^2 .

It is a cyclic number.

It is not a de Polignac number, because 47845813 - 2¹⁷ = 47714741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47845817) 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, 23922906 + 23922907.

It is an arithmetic number, because the mean of its divisors is an integer number (23922907).

Almost surely, 2^47845813 is an apocalyptic number.

It is an amenable number.

47845813 is a deficient number, since it is larger than the sum of its proper divisors (1).

47845813 is an equidigital number, since it uses as much as digits as its factorization.

47845813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 40.

The square root of 47845813 is about 6917.0667916394. The cubic root of 47845813 is about 363.0345673077.

The spelling of 47845813 in words is "forty-seven million, eight hundred forty-five thousand, eight hundred thirteen".