796821 has 4 divisors (see below), whose sum is σ = 1062432. Its totient is φ = 531212.

The previous prime is 796819. The next prime is 796847. The reversal of 796821 is 128697.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 128697 = 3 ⋅42899.

It is a cyclic number.

It is not a de Polignac number, because 796821 - 2¹ = 796819 is a prime.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (796801) 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, 132801 + ... + 132806.

It is an arithmetic number, because the mean of its divisors is an integer number (265608).

2⁷⁹⁶⁸²¹ is an apocalyptic number.

It is an amenable number.

796821 is a deficient number, since it is larger than the sum of its proper divisors (265611).

796821 is a wasteful number, since it uses less digits than its factorization.

796821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265610.

The product of its digits is 6048, while the sum is 33.

The square root of 796821 is about 892.6483070056. The cubic root of 796821 is about 92.7086500122.

The spelling of 796821 in words is "seven hundred ninety-six thousand, eight hundred twenty-one".