491233403 has 2 divisors, whose sum is σ = 491233404. Its totient is φ = 491233402.

The previous prime is 491233373. The next prime is 491233417. The reversal of 491233403 is 304332194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491233403 - 2¹⁴ = 491217019 is a prime.

It is not a weakly prime, because it can be changed into another prime (491233493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245616701 + 245616702.

It is an arithmetic number, because the mean of its divisors is an integer number (245616702).

Almost surely, 2^491233403 is an apocalyptic number.

491233403 is a deficient number, since it is larger than the sum of its proper divisors (1).

491233403 is an equidigital number, since it uses as much as digits as its factorization.

491233403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 491233403 is about 22163.7858453830. The cubic root of 491233403 is about 789.0344465977.

Adding to 491233403 its reverse (304332194), we get a palindrome (795565597).

The spelling of 491233403 in words is "four hundred ninety-one million, two hundred thirty-three thousand, four hundred three".