491023303 has 2 divisors, whose sum is σ = 491023304. Its totient is φ = 491023302.

The previous prime is 491023301. The next prime is 491023333. The reversal of 491023303 is 303320194.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491023303 - 2¹ = 491023301 is a prime.

It is a super-2 number, since 2×491023303² = 482207768178059618, which contains 22 as substring.

Together with 491023301, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491023301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245511651 + 245511652.

It is an arithmetic number, because the mean of its divisors is an integer number (245511652).

Almost surely, 2^491023303 is an apocalyptic number.

491023303 is a deficient number, since it is larger than the sum of its proper divisors (1).

491023303 is an equidigital number, since it uses as much as digits as its factorization.

491023303 is an evil number, because the sum of its binary digits is even.

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

The square root of 491023303 is about 22159.0456247556. The cubic root of 491023303 is about 788.9219408276.

Adding to 491023303 its reverse (303320194), we get a palindrome (794343497).

The spelling of 491023303 in words is "four hundred ninety-one million, twenty-three thousand, three hundred three".