499522509 has 48 divisors (see below), whose sum is σ = 784695600. Its totient is φ = 305031168.

The previous prime is 499522501. The next prime is 499522531. The reversal of 499522509 is 905225994.

499522509 is a `hidden beast` number, since 4 + 99 + 52 + 2 + 509 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 32832900 + 466689609 = 5730^2 + 21603^2 .

It is not a de Polignac number, because 499522509 - 2³ = 499522501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499522501) 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 in 47 ways as a sum of consecutive naturals, for example, 1856827 + ... + 1857095.

It is an arithmetic number, because the mean of its divisors is an integer number (16347825).

Almost surely, 2^499522509 is an apocalyptic number.

It is an amenable number.

499522509 is a deficient number, since it is larger than the sum of its proper divisors (285173091).

499522509 is a wasteful number, since it uses less digits than its factorization.

499522509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 499522509 is about 22350.0002013423. Note that the first 3 decimals coincide. The cubic root of 499522509 is about 793.4477889420.

The spelling of 499522509 in words is "four hundred ninety-nine million, five hundred twenty-two thousand, five hundred nine".