499509585 has 24 divisors (see below), whose sum is σ = 897886080. Its totient is φ = 266404464.

The previous prime is 499509559. The next prime is 499509587. The reversal of 499509585 is 585905994.

499509585 is a `hidden beast` number, since 4 + 9 + 9 + 50 + 9 + 585 = 666.

It is not a de Polignac number, because 499509585 - 2¹⁰ = 499508561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (499509587) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204345 + ... + 206774.

It is an arithmetic number, because the mean of its divisors is an integer number (37411920).

Almost surely, 2^499509585 is an apocalyptic number.

499509585 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

499509585 is a deficient number, since it is larger than the sum of its proper divisors (398376495).

499509585 is an equidigital number, since it uses as much as digits as its factorization.

499509585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411139 (or 411127 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 54.

The square root of 499509585 is about 22349.7110719580. The cubic root of 499509585 is about 793.4409460020.

The spelling of 499509585 in words is "four hundred ninety-nine million, five hundred nine thousand, five hundred eighty-five".