690540203 has 2 divisors, whose sum is σ = 690540204. Its totient is φ = 690540202.

The previous prime is 690540197. The next prime is 690540211. The reversal of 690540203 is 302045096.

690540203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690540203 - 2¹⁸ = 690278059 is a prime.

It is not a weakly prime, because it can be changed into another prime (690540703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345270101 + 345270102.

It is an arithmetic number, because the mean of its divisors is an integer number (345270102).

Almost surely, 2^690540203 is an apocalyptic number.

690540203 is a deficient number, since it is larger than the sum of its proper divisors (1).

690540203 is an equidigital number, since it uses as much as digits as its factorization.

690540203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 690540203 is about 26278.1316497197. The cubic root of 690540203 is about 883.8861375941.

Adding to 690540203 its reverse (302045096), we get a palindrome (992585299).

The spelling of 690540203 in words is "six hundred ninety million, five hundred forty thousand, two hundred three".