804309557 has 2 divisors, whose sum is σ = 804309558. Its totient is φ = 804309556.

The previous prime is 804309553. The next prime is 804309613. The reversal of 804309557 is 755903408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451095121 + 353214436 = 21239^2 + 18794^2 .

It is a cyclic number.

It is not a de Polignac number, because 804309557 - 2² = 804309553 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (804309553) 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, 402154778 + 402154779.

It is an arithmetic number, because the mean of its divisors is an integer number (402154779).

Almost surely, 2^804309557 is an apocalyptic number.

It is an amenable number.

804309557 is a deficient number, since it is larger than the sum of its proper divisors (1).

804309557 is an equidigital number, since it uses as much as digits as its factorization.

804309557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 804309557 is about 28360.3518490163. The cubic root of 804309557 is about 929.9817150604.

The spelling of 804309557 in words is "eight hundred four million, three hundred nine thousand, five hundred fifty-seven".