4999909 has 4 divisors (see below), whose sum is σ = 5121900. Its totient is φ = 4877920.

The previous prime is 4999889. The next prime is 4999913. The reversal of 4999909 is 9099994.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 497025 + 4502884 = 705^2 + 2122^2 .

It is a cyclic number.

It is not a de Polignac number, because 4999909 - 2⁷ = 4999781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4999949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60934 + ... + 61015.

It is an arithmetic number, because the mean of its divisors is an integer number (1280475).

Almost surely, 2^4999909 is an apocalyptic number.

It is an amenable number.

4999909 is a deficient number, since it is larger than the sum of its proper divisors (121991).

4999909 is a wasteful number, since it uses less digits than its factorization.

4999909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121990.

The product of its (nonzero) digits is 236196, while the sum is 49.

The square root of 4999909 is about 2236.0476291886. The cubic root of 4999909 is about 170.9965572760.

The spelling of 4999909 in words is "four million, nine hundred ninety-nine thousand, nine hundred nine".