799721 has 8 divisors (see below), whose sum is σ = 868224. Its totient is φ = 732240.

The previous prime is 799679. The next prime is 799723. The reversal of 799721 is 127997.

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 799721 - 2⁶ = 799657 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (799723) 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 in 7 ways as a sum of consecutive naturals, for example, 2816 + ... + 3086.

It is an arithmetic number, because the mean of its divisors is an integer number (108528).

2⁷⁹⁹⁷²¹ is an apocalyptic number.

It is an amenable number.

799721 is a deficient number, since it is larger than the sum of its proper divisors (68503).

799721 is a wasteful number, since it uses less digits than its factorization.

799721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511.

The product of its digits is 7938, while the sum is 35.

The square root of 799721 is about 894.2712116579. The cubic root of 799721 is about 92.8209837234.

The spelling of 799721 in words is "seven hundred ninety-nine thousand, seven hundred twenty-one".