47832821 has 2 divisors, whose sum is σ = 47832822. Its totient is φ = 47832820.

The previous prime is 47832809. The next prime is 47832857. The reversal of 47832821 is 12823874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46771921 + 1060900 = 6839^2 + 1030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47832821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47832881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23916410 + 23916411.

It is an arithmetic number, because the mean of its divisors is an integer number (23916411).

Almost surely, 2^47832821 is an apocalyptic number.

It is an amenable number.

47832821 is a deficient number, since it is larger than the sum of its proper divisors (1).

47832821 is an equidigital number, since it uses as much as digits as its factorization.

47832821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 35.

The square root of 47832821 is about 6916.1276014834. The cubic root of 47832821 is about 363.0017049960.

The spelling of 47832821 in words is "forty-seven million, eight hundred thirty-two thousand, eight hundred twenty-one".