4902809 has 4 divisors (see below), whose sum is σ = 4907280. Its totient is φ = 4898340.

The previous prime is 4902803. The next prime is 4902811. The reversal of 4902809 is 9082094.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4902809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4902803) 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, 662 + ... + 3200.

It is an arithmetic number, because the mean of its divisors is an integer number (1226820).

Almost surely, 2^4902809 is an apocalyptic number.

It is an amenable number.

4902809 is a deficient number, since it is larger than the sum of its proper divisors (4471).

4902809 is a wasteful number, since it uses less digits than its factorization.

4902809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 4902809 is about 2214.2287596362. The cubic root of 4902809 is about 169.8823753806.

The spelling of 4902809 in words is "four million, nine hundred two thousand, eight hundred nine".