491271299 has 2 divisors, whose sum is σ = 491271300. Its totient is φ = 491271298.

The previous prime is 491271293. The next prime is 491271301. The reversal of 491271299 is 992172194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491271299 - 2¹⁶ = 491205763 is a prime.

It is a super-2 number, since 2×491271299² = 482694978442294802, which contains 22 as substring.

Together with 491271301, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (491271293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245635649 + 245635650.

It is an arithmetic number, because the mean of its divisors is an integer number (245635650).

Almost surely, 2^491271299 is an apocalyptic number.

491271299 is a deficient number, since it is larger than the sum of its proper divisors (1).

491271299 is an equidigital number, since it uses as much as digits as its factorization.

491271299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 491271299 is about 22164.6407369937. The cubic root of 491271299 is about 789.0547359892.

The spelling of 491271299 in words is "four hundred ninety-one million, two hundred seventy-one thousand, two hundred ninety-nine".