813203 has 2 divisors, whose sum is σ = 813204. Its totient is φ = 813202.

The previous prime is 813199. The next prime is 813209. The reversal of 813203 is 302318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 813203 - 2² = 813199 is a prime.

It is a super-2 number, since 2×813203² = 1322598238418, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (813209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406601 + 406602.

It is an arithmetic number, because the mean of its divisors is an integer number (406602).

2⁸¹³²⁰³ is an apocalyptic number.

813203 is a deficient number, since it is larger than the sum of its proper divisors (1).

813203 is an equidigital number, since it uses as much as digits as its factorization.

813203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 813203 is about 901.7776887903. Note that the first 3 decimals coincide. The cubic root of 813203 is about 93.3396835249.

The spelling of 813203 in words is "eight hundred thirteen thousand, two hundred three".