499906009 has 4 divisors (see below), whose sum is σ = 502698960. Its totient is φ = 497113060.

The previous prime is 499905977. The next prime is 499906027. The reversal of 499906009 is 900609994.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 499906009 - 2⁵ = 499905977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 499906009.

It is not an unprimeable number, because it can be changed into a prime (499906049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1396207 + ... + 1396564.

It is an arithmetic number, because the mean of its divisors is an integer number (125674740).

Almost surely, 2^499906009 is an apocalyptic number.

It is an amenable number.

499906009 is a deficient number, since it is larger than the sum of its proper divisors (2792951).

499906009 is a wasteful number, since it uses less digits than its factorization.

499906009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792950.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 499906009 is about 22358.5779735653. The cubic root of 499906009 is about 793.6507890633.

The spelling of 499906009 in words is "four hundred ninety-nine million, nine hundred six thousand, nine".