4909909 has 4 divisors (see below), whose sum is σ = 4955904. Its totient is φ = 4863916.

The previous prime is 4909871. The next prime is 4909939. The reversal of 4909909 is 9099094.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9099094 = 2 ⋅4549547.

It is a cyclic number.

It is not a de Polignac number, because 4909909 - 2⁷ = 4909781 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4909939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22837 + ... + 23050.

It is an arithmetic number, because the mean of its divisors is an integer number (1238976).

Almost surely, 2^4909909 is an apocalyptic number.

It is an amenable number.

4909909 is a deficient number, since it is larger than the sum of its proper divisors (45995).

4909909 is a wasteful number, since it uses less digits than its factorization.

4909909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45994.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 4909909 is about 2215.8314466583. The cubic root of 4909909 is about 169.9643408482.

The spelling of 4909909 in words is "four million, nine hundred nine thousand, nine hundred nine".