8293019921 has 2 divisors, whose sum is σ = 8293019922. Its totient is φ = 8293019920.

The previous prime is 8293019899. The next prime is 8293019923. The reversal of 8293019921 is 1299103928.

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., 6966239296 + 1326780625 = 83464^2 + 36425^2 .

It is a cyclic number.

It is not a de Polignac number, because 8293019921 - 2³⁰ = 7219278097 is a prime.

Together with 8293019923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8293019923) 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, 4146509960 + 4146509961.

It is an arithmetic number, because the mean of its divisors is an integer number (4146509961).

Almost surely, 2^8293019921 is an apocalyptic number.

It is an amenable number.

8293019921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8293019921 is an equidigital number, since it uses as much as digits as its factorization.

8293019921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 8293019921 is about 91066.0195737137. The cubic root of 8293019921 is about 2024.1261216207.

The spelling of 8293019921 in words is "eight billion, two hundred ninety-three million, nineteen thousand, nine hundred twenty-one".