499791491 has 2 divisors, whose sum is σ = 499791492. Its totient is φ = 499791490.

The previous prime is 499791443. The next prime is 499791497. The reversal of 499791491 is 194197994.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499791491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (499791497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249895745 + 249895746.

It is an arithmetic number, because the mean of its divisors is an integer number (249895746).

Almost surely, 2^499791491 is an apocalyptic number.

499791491 is a deficient number, since it is larger than the sum of its proper divisors (1).

499791491 is an equidigital number, since it uses as much as digits as its factorization.

499791491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 53.

The square root of 499791491 is about 22356.0168858408. The cubic root of 499791491 is about 793.5901815088.

The spelling of 499791491 in words is "four hundred ninety-nine million, seven hundred ninety-one thousand, four hundred ninety-one".