491303203 has 2 divisors, whose sum is σ = 491303204. Its totient is φ = 491303202.

The previous prime is 491303177. The next prime is 491303209. The reversal of 491303203 is 302303194.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491303203 - 2⁵ = 491303171 is a prime.

It is not a weakly prime, because it can be changed into another prime (491303209) 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, 245651601 + 245651602.

It is an arithmetic number, because the mean of its divisors is an integer number (245651602).

Almost surely, 2^491303203 is an apocalyptic number.

491303203 is a deficient number, since it is larger than the sum of its proper divisors (1).

491303203 is an equidigital number, since it uses as much as digits as its factorization.

491303203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 491303203 is about 22165.3604301848. The cubic root of 491303203 is about 789.0718164750.

Adding to 491303203 its reverse (302303194), we get a palindrome (793606397).

The spelling of 491303203 in words is "four hundred ninety-one million, three hundred three thousand, two hundred three".