499887909 has 8 divisors (see below), whose sum is σ = 740574720. Its totient is φ = 333258588.

The previous prime is 499887887. The next prime is 499887917. The reversal of 499887909 is 909788994.

It is not a de Polignac number, because 499887909 - 2⁸ = 499887653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499887919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9257157 + ... + 9257210.

It is an arithmetic number, because the mean of its divisors is an integer number (92571840).

Almost surely, 2^499887909 is an apocalyptic number.

It is an amenable number.

499887909 is a deficient number, since it is larger than the sum of its proper divisors (240686811).

499887909 is a wasteful number, since it uses less digits than its factorization.

499887909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18514376 (or 18514370 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 63.

The square root of 499887909 is about 22358.1732035513. The cubic root of 499887909 is about 793.6412104276.

The spelling of 499887909 in words is "four hundred ninety-nine million, eight hundred eighty-seven thousand, nine hundred nine".