797971 has 4 divisors (see below), whose sum is σ = 823744. Its totient is φ = 772200.

The previous prime is 797957. The next prime is 797977. The reversal of 797971 is 179797.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179797 = 19 ⋅9463.

It is a cyclic number.

It is not a de Polignac number, because 797971 - 2¹⁵ = 765203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (797977) 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, 12840 + ... + 12901.

It is an arithmetic number, because the mean of its divisors is an integer number (205936).

2⁷⁹⁷⁹⁷¹ is an apocalyptic number.

797971 is a deficient number, since it is larger than the sum of its proper divisors (25773).

797971 is a wasteful number, since it uses less digits than its factorization.

797971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25772.

The product of its digits is 27783, while the sum is 40.

The square root of 797971 is about 893.2922254223. The cubic root of 797971 is about 92.7532286978.

The spelling of 797971 in words is "seven hundred ninety-seven thousand, nine hundred seventy-one".