820203 has 8 divisors (see below), whose sum is σ = 1141248. Its totient is φ = 522984.

The previous prime is 820201. The next prime is 820213. The reversal of 820203 is 302028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 820203 - 2¹ = 820201 is a prime.

It is a super-2 number, since 2×820203² = 1345465922418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (820201) 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, 5875 + ... + 6012.

It is an arithmetic number, because the mean of its divisors is an integer number (142656).

2⁸²⁰²⁰³ is an apocalyptic number.

820203 is a deficient number, since it is larger than the sum of its proper divisors (321045).

820203 is a wasteful number, since it uses less digits than its factorization.

820203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11913.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 820203 is about 905.6505948764. The cubic root of 820203 is about 93.6067394154.

The spelling of 820203 in words is "eight hundred twenty thousand, two hundred three".