499220509 has 2 divisors, whose sum is σ = 499220510. Its totient is φ = 499220508.

The previous prime is 499220479. The next prime is 499220549. The reversal of 499220509 is 905022994.

It is an a-pointer prime, because the next prime (499220549) can be obtained adding 499220509 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399120484 + 100100025 = 19978^2 + 10005^2 .

It is a cyclic number.

It is not a de Polignac number, because 499220509 - 2⁹ = 499219997 is a prime.

It is a super-2 number, since 2×499220509² = 498442233212438162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499220549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249610254 + 249610255.

It is an arithmetic number, because the mean of its divisors is an integer number (249610255).

Almost surely, 2^499220509 is an apocalyptic number.

It is an amenable number.

499220509 is a deficient number, since it is larger than the sum of its proper divisors (1).

499220509 is an equidigital number, since it uses as much as digits as its factorization.

499220509 is an evil number, because the sum of its binary digits is even.

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

The square root of 499220509 is about 22343.2430278149. The cubic root of 499220509 is about 793.2878565172.

The spelling of 499220509 in words is "four hundred ninety-nine million, two hundred twenty thousand, five hundred nine".