805542659 has 2 divisors, whose sum is σ = 805542660. Its totient is φ = 805542658.

The previous prime is 805542643. The next prime is 805542701. The reversal of 805542659 is 956245508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 805542659 - 2⁴ = 805542643 is a prime.

It is not a weakly prime, because it can be changed into another prime (805544659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402771329 + 402771330.

It is an arithmetic number, because the mean of its divisors is an integer number (402771330).

Almost surely, 2^805542659 is an apocalyptic number.

805542659 is a deficient number, since it is larger than the sum of its proper divisors (1).

805542659 is an equidigital number, since it uses as much as digits as its factorization.

805542659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 44.

The square root of 805542659 is about 28382.0834154225. The cubic root of 805542659 is about 930.4567298357.

The spelling of 805542659 in words is "eight hundred five million, five hundred forty-two thousand, six hundred fifty-nine".