820079 has 8 divisors (see below), whose sum is σ = 890400. Its totient is φ = 750816.

The previous prime is 820073. The next prime is 820093. The reversal of 820079 is 970028.

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 820079 - 2⁸ = 819823 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820073) 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, 2429 + ... + 2745.

It is an arithmetic number, because the mean of its divisors is an integer number (111300).

2⁸²⁰⁰⁷⁹ is an apocalyptic number.

820079 is a deficient number, since it is larger than the sum of its proper divisors (70321).

820079 is a wasteful number, since it uses less digits than its factorization.

820079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 820079 is about 905.5821332160. The cubic root of 820079 is about 93.6020219570.

The spelling of 820079 in words is "eight hundred twenty thousand, seventy-nine".