799864509 has 8 divisors (see below), whose sum is σ = 1070127072. Its totient is φ = 531422480.

The previous prime is 799864469. The next prime is 799864517. The reversal of 799864509 is 905468997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 799864509 - 2⁹ = 799863997 is a prime.

It is a super-2 number, since 2×799864509² = 1279566465515622162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799864579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454107 + ... + 455864.

It is an arithmetic number, because the mean of its divisors is an integer number (133765884).

Almost surely, 2^799864509 is an apocalyptic number.

It is an amenable number.

799864509 is a deficient number, since it is larger than the sum of its proper divisors (270262563).

799864509 is a wasteful number, since it uses less digits than its factorization.

799864509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910267.

The product of its (nonzero) digits is 4898880, while the sum is 57.

The square root of 799864509 is about 28281.8759809175. The cubic root of 799864509 is about 928.2653559709.

The spelling of 799864509 in words is "seven hundred ninety-nine million, eight hundred sixty-four thousand, five hundred nine".