47845817 has 2 divisors, whose sum is σ = 47845818. Its totient is φ = 47845816.

The previous prime is 47845813. The next prime is 47845823. The reversal of 47845817 is 71854874.

47845817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35093776 + 12752041 = 5924^2 + 3571^2 .

It is a cyclic number.

It is not a de Polignac number, because 47845817 - 2² = 47845813 is a prime.

It is not a weakly prime, because it can be changed into another prime (47845813) 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, 23922908 + 23922909.

It is an arithmetic number, because the mean of its divisors is an integer number (23922909).

Almost surely, 2^47845817 is an apocalyptic number.

It is an amenable number.

47845817 is a deficient number, since it is larger than the sum of its proper divisors (1).

47845817 is an equidigital number, since it uses as much as digits as its factorization.

47845817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250880, while the sum is 44.

The square root of 47845817 is about 6917.0670807793. The cubic root of 47845817 is about 363.0345774245.

It can be divided in two parts, 4784 and 5817, that added together give a palindrome (10601).

The spelling of 47845817 in words is "forty-seven million, eight hundred forty-five thousand, eight hundred seventeen".