491265319 has 2 divisors, whose sum is σ = 491265320. Its totient is φ = 491265318.

The previous prime is 491265287. The next prime is 491265331. The reversal of 491265319 is 913562194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491265319 - 2⁵ = 491265287 is a prime.

It is a super-2 number, since 2×491265319² = 482683227304343522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491235319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245632659 + 245632660.

It is an arithmetic number, because the mean of its divisors is an integer number (245632660).

Almost surely, 2^491265319 is an apocalyptic number.

491265319 is a deficient number, since it is larger than the sum of its proper divisors (1).

491265319 is an equidigital number, since it uses as much as digits as its factorization.

491265319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 491265319 is about 22164.5058370359. The cubic root of 491265319 is about 789.0515343866.

It can be divided in two parts, 49126 and 5319, that added together give a palindrome (54445).

The spelling of 491265319 in words is "four hundred ninety-one million, two hundred sixty-five thousand, three hundred nineteen".