4949809 has 4 divisors (see below), whose sum is σ = 4956660. Its totient is φ = 4942960.

The previous prime is 4949797. The next prime is 4949827. The reversal of 4949809 is 9089494.

4949809 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3186225 + 1763584 = 1785^2 + 1328^2 .

It is a cyclic number.

It is not a de Polignac number, because 4949809 - 2⁹ = 4949297 is a prime.

It is a Duffinian number.

4949809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4940809) 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, 2194 + ... + 3835.

It is an arithmetic number, because the mean of its divisors is an integer number (1239165).

Almost surely, 2^4949809 is an apocalyptic number.

It is an amenable number.

4949809 is a deficient number, since it is larger than the sum of its proper divisors (6851).

4949809 is an equidigital number, since it uses as much as digits as its factorization.

4949809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6850.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 4949809 is about 2224.8166216567. The cubic root of 4949809 is about 170.4235000505.

The spelling of 4949809 in words is "four million, nine hundred forty-nine thousand, eight hundred nine".