47850821 has 2 divisors, whose sum is σ = 47850822. Its totient is φ = 47850820.

The previous prime is 47850811. The next prime is 47850851. The reversal of 47850821 is 12805874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46444225 + 1406596 = 6815^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 47850821 - 2⁶ = 47850757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47850811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23925410 + 23925411.

It is an arithmetic number, because the mean of its divisors is an integer number (23925411).

Almost surely, 2^47850821 is an apocalyptic number.

It is an amenable number.

47850821 is a deficient number, since it is larger than the sum of its proper divisors (1).

47850821 is an equidigital number, since it uses as much as digits as its factorization.

47850821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 47850821 is about 6917.4287853219. The cubic root of 47850821 is about 363.0472330881.

The spelling of 47850821 in words is "forty-seven million, eight hundred fifty thousand, eight hundred twenty-one".