804821593 has 2 divisors, whose sum is σ = 804821594. Its totient is φ = 804821592.

The previous prime is 804821581. The next prime is 804821609. The reversal of 804821593 is 395128408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 594774544 + 210047049 = 24388^2 + 14493^2 .

It is a cyclic number.

It is not a de Polignac number, because 804821593 - 2⁹ = 804821081 is a prime.

It is not a weakly prime, because it can be changed into another prime (804821573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402410796 + 402410797.

It is an arithmetic number, because the mean of its divisors is an integer number (402410797).

Almost surely, 2^804821593 is an apocalyptic number.

It is an amenable number.

804821593 is a deficient number, since it is larger than the sum of its proper divisors (1).

804821593 is an equidigital number, since it uses as much as digits as its factorization.

804821593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 804821593 is about 28369.3777337466. The cubic root of 804821593 is about 930.1790201487.

The spelling of 804821593 in words is "eight hundred four million, eight hundred twenty-one thousand, five hundred ninety-three".