499997291 has 2 divisors, whose sum is σ = 499997292. Its totient is φ = 499997290.

The previous prime is 499997273. The next prime is 499997339. The reversal of 499997291 is 192799994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 499997291 - 2¹⁸ = 499735147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 499997291.

It is not a weakly prime, because it can be changed into another prime (499997231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249998645 + 249998646.

It is an arithmetic number, because the mean of its divisors is an integer number (249998646).

Almost surely, 2^499997291 is an apocalyptic number.

499997291 is a deficient number, since it is larger than the sum of its proper divisors (1).

499997291 is an equidigital number, since it uses as much as digits as its factorization.

499997291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3306744, while the sum is 59.

The square root of 499997291 is about 22360.6191998343. The cubic root of 499997291 is about 793.6990925584.

The spelling of 499997291 in words is "four hundred ninety-nine million, nine hundred ninety-seven thousand, two hundred ninety-one".