799920007489 has 4 divisors (see below), whose sum is σ = 799958351556. Its totient is φ = 799881663424.

The previous prime is 799920007451. The next prime is 799920007499. The reversal of 799920007489 is 984700029997.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108361447489 + 691558560000 = 329183^2 + 831600^2 .

It is a cyclic number.

It is not a de Polignac number, because 799920007489 - 2²³ = 799911618881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 799920007489.

It is not an unprimeable number, because it can be changed into a prime (799920007499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19140724 + ... + 19182469.

It is an arithmetic number, because the mean of its divisors is an integer number (199989587889).

Almost surely, 2^799920007489 is an apocalyptic number.

It is an amenable number.

799920007489 is a deficient number, since it is larger than the sum of its proper divisors (38344067).

799920007489 is a wasteful number, since it uses less digits than its factorization.

799920007489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38344066.

The product of its (nonzero) digits is 20575296, while the sum is 64.

The spelling of 799920007489 in words is "seven hundred ninety-nine billion, nine hundred twenty million, seven thousand, four hundred eighty-nine".