797891 has 4 divisors (see below), whose sum is σ = 799800. Its totient is φ = 795984.

The previous prime is 797887. The next prime is 797897. The reversal of 797891 is 198797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198797 = 19 ⋅10463.

It is a cyclic number.

It is not a de Polignac number, because 797891 - 2² = 797887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (797897) 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, 26 + ... + 1263.

It is an arithmetic number, because the mean of its divisors is an integer number (199950).

2⁷⁹⁷⁸⁹¹ is an apocalyptic number.

797891 is a deficient number, since it is larger than the sum of its proper divisors (1909).

797891 is a wasteful number, since it uses less digits than its factorization.

797891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908.

The product of its digits is 31752, while the sum is 41.

The square root of 797891 is about 893.2474461201. The cubic root of 797891 is about 92.7501289585.

The spelling of 797891 in words is "seven hundred ninety-seven thousand, eight hundred ninety-one".