50847721 has 2 divisors, whose sum is σ = 50847722. Its totient is φ = 50847720.

The previous prime is 50847689. The next prime is 50847739. The reversal of 50847721 is 12774805.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31584400 + 19263321 = 5620^2 + 4389^2 .

It is a cyclic number.

It is not a de Polignac number, because 50847721 - 2⁵ = 50847689 is a prime.

It is not a weakly prime, because it can be changed into another prime (50847821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25423860 + 25423861.

It is an arithmetic number, because the mean of its divisors is an integer number (25423861).

Almost surely, 2^50847721 is an apocalyptic number.

It is an amenable number.

50847721 is a deficient number, since it is larger than the sum of its proper divisors (1).

50847721 is an equidigital number, since it uses as much as digits as its factorization.

50847721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 50847721 is about 7130.7587955280. The cubic root of 50847721 is about 370.4735135503.

The spelling of 50847721 in words is "fifty million, eight hundred forty-seven thousand, seven hundred twenty-one".