491124511 has 2 divisors, whose sum is σ = 491124512. Its totient is φ = 491124510.

The previous prime is 491124503. The next prime is 491124551. The reversal of 491124511 is 115421194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491124511 - 2³ = 491124503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491124511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491124551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245562255 + 245562256.

It is an arithmetic number, because the mean of its divisors is an integer number (245562256).

Almost surely, 2^491124511 is an apocalyptic number.

491124511 is a deficient number, since it is larger than the sum of its proper divisors (1).

491124511 is an equidigital number, since it uses as much as digits as its factorization.

491124511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 28.

The square root of 491124511 is about 22161.3291794513. The cubic root of 491124511 is about 788.9761403779.

The spelling of 491124511 in words is "four hundred ninety-one million, one hundred twenty-four thousand, five hundred eleven".