797999 has 4 divisors (see below), whose sum is σ = 803880. Its totient is φ = 792120.

The previous prime is 797987. The next prime is 798023. The reversal of 797999 is 999797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999797 = 433 ⋅2309.

It is a cyclic number.

It is not a de Polignac number, because 797999 - 2⁸ = 797743 is a prime.

It is a Duffinian number.

797999 is a modest number, since divided by 999 gives 797 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797399) 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 3 ways as a sum of consecutive naturals, for example, 2732 + ... + 3009.

It is an arithmetic number, because the mean of its divisors is an integer number (200970).

2⁷⁹⁷⁹⁹⁹ is an apocalyptic number.

797999 is a deficient number, since it is larger than the sum of its proper divisors (5881).

797999 is a wasteful number, since it uses less digits than its factorization.

797999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5880.

The product of its digits is 321489, while the sum is 50.

The square root of 797999 is about 893.3078976478. The cubic root of 797999 is about 92.7543135576.

The spelling of 797999 in words is "seven hundred ninety-seven thousand, nine hundred ninety-nine".