799780609 has 2 divisors, whose sum is σ = 799780610. Its totient is φ = 799780608.

The previous prime is 799780591. The next prime is 799780651. The reversal of 799780609 is 906087997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 494929009 + 304851600 = 22247^2 + 17460^2 .

It is a cyclic number.

It is not a de Polignac number, because 799780609 - 2¹⁷ = 799649537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 799780609.

It is not a weakly prime, because it can be changed into another prime (799780669) 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, 399890304 + 399890305.

It is an arithmetic number, because the mean of its divisors is an integer number (399890305).

Almost surely, 2^799780609 is an apocalyptic number.

It is an amenable number.

799780609 is a deficient number, since it is larger than the sum of its proper divisors (1).

799780609 is an equidigital number, since it uses as much as digits as its factorization.

799780609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The square root of 799780609 is about 28280.3926599331. The cubic root of 799780609 is about 928.2328987294.

The spelling of 799780609 in words is "seven hundred ninety-nine million, seven hundred eighty thousand, six hundred nine".