820027 has 4 divisors (see below), whose sum is σ = 883120. Its totient is φ = 756936.

The previous prime is 819991. The next prime is 820037. The reversal of 820027 is 720028.

820027 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 820027 - 2⁷ = 819899 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 junction number, because it is equal to n+sod(n) for n = 819986 and 820013.

It is not an unprimeable number, because it can be changed into a prime (820037) 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, 31527 + ... + 31552.

It is an arithmetic number, because the mean of its divisors is an integer number (220780).

2⁸²⁰⁰²⁷ is an apocalyptic number.

820027 is a deficient number, since it is larger than the sum of its proper divisors (63093).

820027 is a wasteful number, since it uses less digits than its factorization.

820027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63092.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 820027 is about 905.5534219470. The cubic root of 820027 is about 93.6000435264.

Subtracting from 820027 its reverse (720028), we obtain a palindrome (99999).

The spelling of 820027 in words is "eight hundred twenty thousand, twenty-seven".