8148821 has 2 divisors, whose sum is σ = 8148822. Its totient is φ = 8148820.

The previous prime is 8148809. The next prime is 8148827. The reversal of 8148821 is 1288418.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5712100 + 2436721 = 2390^2 + 1561^2 .

It is a cyclic number.

It is not a de Polignac number, because 8148821 - 2⁶ = 8148757 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 (8148827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4074410 + 4074411.

It is an arithmetic number, because the mean of its divisors is an integer number (4074411).

Almost surely, 2^8148821 is an apocalyptic number.

It is an amenable number.

8148821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8148821 is an equidigital number, since it uses as much as digits as its factorization.

8148821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4096, while the sum is 32.

The square root of 8148821 is about 2854.6139844119. The cubic root of 8148821 is about 201.2325633338.

The spelling of 8148821 in words is "eight million, one hundred forty-eight thousand, eight hundred twenty-one".