685533203 has 2 divisors, whose sum is σ = 685533204. Its totient is φ = 685533202.

The previous prime is 685533139. The next prime is 685533209. The reversal of 685533203 is 302335586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685533203 - 2⁶ = 685533139 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (685533209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342766601 + 342766602.

It is an arithmetic number, because the mean of its divisors is an integer number (342766602).

Almost surely, 2^685533203 is an apocalyptic number.

685533203 is a deficient number, since it is larger than the sum of its proper divisors (1).

685533203 is an equidigital number, since it uses as much as digits as its factorization.

685533203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 685533203 is about 26182.6889948302. The cubic root of 685533203 is about 881.7446462134.

Adding to 685533203 its reverse (302335586), we get a palindrome (987868789).

The spelling of 685533203 in words is "six hundred eighty-five million, five hundred thirty-three thousand, two hundred three".