499505491 has 2 divisors, whose sum is σ = 499505492. Its totient is φ = 499505490.

The previous prime is 499505473. The next prime is 499505507. The reversal of 499505491 is 194505994.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 499505491 - 2¹⁷ = 499374419 is a prime.

It is not a weakly prime, because it can be changed into another prime (499505411) 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, 249752745 + 249752746.

It is an arithmetic number, because the mean of its divisors is an integer number (249752746).

Almost surely, 2^499505491 is an apocalyptic number.

499505491 is a deficient number, since it is larger than the sum of its proper divisors (1).

499505491 is an equidigital number, since it uses as much as digits as its factorization.

499505491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 499505491 is about 22349.6194822194. The cubic root of 499505491 is about 793.4387783051.

The spelling of 499505491 in words is "four hundred ninety-nine million, five hundred five thousand, four hundred ninety-one".