820973203 has 2 divisors, whose sum is σ = 820973204. Its totient is φ = 820973202.

The previous prime is 820973191. The next prime is 820973207. The reversal of 820973203 is 302379028.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 820973203 - 2¹³ = 820965011 is a prime.

It is not a weakly prime, because it can be changed into another prime (820973207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410486601 + 410486602.

It is an arithmetic number, because the mean of its divisors is an integer number (410486602).

Almost surely, 2^820973203 is an apocalyptic number.

820973203 is a deficient number, since it is larger than the sum of its proper divisors (1).

820973203 is an equidigital number, since it uses as much as digits as its factorization.

820973203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 820973203 is about 28652.6299490989. The cubic root of 820973203 is about 936.3603039019.

The spelling of 820973203 in words is "eight hundred twenty million, nine hundred seventy-three thousand, two hundred three".