799699009 has 2 divisors, whose sum is σ = 799699010. Its totient is φ = 799699008.

The previous prime is 799698967. The next prime is 799699097. The reversal of 799699009 is 900996997.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 787644225 + 12054784 = 28065^2 + 3472^2 .

It is an emirp because it is prime and its reverse (900996997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 799699009 - 2⁷ = 799698881 is a prime.

It is not a weakly prime, because it can be changed into another prime (799699409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399849504 + 399849505.

It is an arithmetic number, because the mean of its divisors is an integer number (399849505).

Almost surely, 2^799699009 is an apocalyptic number.

It is an amenable number.

799699009 is a deficient number, since it is larger than the sum of its proper divisors (1).

799699009 is an equidigital number, since it uses as much as digits as its factorization.

799699009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2480058, while the sum is 58.

The square root of 799699009 is about 28278.9499274637. The cubic root of 799699009 is about 928.2013290798.

The spelling of 799699009 in words is "seven hundred ninety-nine million, six hundred ninety-nine thousand, nine".