491507299 has 2 divisors, whose sum is σ = 491507300. Its totient is φ = 491507298.

The previous prime is 491507293. The next prime is 491507323. The reversal of 491507299 is 992705194.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491507299 - 2¹⁹ = 490983011 is a prime.

It is a super-3 number, since 3×491507299³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (491507293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245753649 + 245753650.

It is an arithmetic number, because the mean of its divisors is an integer number (245753650).

Almost surely, 2^491507299 is an apocalyptic number.

491507299 is a deficient number, since it is larger than the sum of its proper divisors (1).

491507299 is an equidigital number, since it uses as much as digits as its factorization.

491507299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 491507299 is about 22169.9638926183. The cubic root of 491507299 is about 789.1810661231.

The spelling of 491507299 in words is "four hundred ninety-one million, five hundred seven thousand, two hundred ninety-nine".