47843021 has 2 divisors, whose sum is σ = 47843022. Its totient is φ = 47843020.

The previous prime is 47842997. The next prime is 47843027. The reversal of 47843021 is 12034874.

47843021 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., 30085225 + 17757796 = 5485^2 + 4214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47843021 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47843027) 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, 23921510 + 23921511.

It is an arithmetic number, because the mean of its divisors is an integer number (23921511).

Almost surely, 2^47843021 is an apocalyptic number.

It is an amenable number.

47843021 is a deficient number, since it is larger than the sum of its proper divisors (1).

47843021 is an equidigital number, since it uses as much as digits as its factorization.

47843021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 47843021 is about 6916.8649690449. The cubic root of 47843021 is about 363.0275056503.

Adding to 47843021 its reverse (12034874), we get a palindrome (59877895).

The spelling of 47843021 in words is "forty-seven million, eight hundred forty-three thousand, twenty-one".