820373 has 4 divisors (see below), whose sum is σ = 823308. Its totient is φ = 817440.

The previous prime is 820367. The next prime is 820399. The reversal of 820373 is 373028.

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

It can be written as a sum of positive squares in 2 ways, for example, as 268324 + 552049 = 518^2 + 743^2 .

It is a cyclic number.

It is not a de Polignac number, because 820373 - 2⁸ = 820117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820333) 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, 998 + ... + 1623.

It is an arithmetic number, because the mean of its divisors is an integer number (205827).

2⁸²⁰³⁷³ is an apocalyptic number.

It is an amenable number.

820373 is a deficient number, since it is larger than the sum of its proper divisors (2935).

820373 is a wasteful number, since it uses less digits than its factorization.

820373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 820373 is about 905.7444451941. The cubic root of 820373 is about 93.6132061260.

The spelling of 820373 in words is "eight hundred twenty thousand, three hundred seventy-three".