4942809 has 8 divisors (see below), whose sum is σ = 7322720. Its totient is φ = 3295188.

The previous prime is 4942799. The next prime is 4942811. The reversal of 4942809 is 9082494.

It is a happy number.

It is not a de Polignac number, because 4942809 - 2²¹ = 2845657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4942879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91507 + ... + 91560.

It is an arithmetic number, because the mean of its divisors is an integer number (915340).

Almost surely, 2^4942809 is an apocalyptic number.

It is an amenable number.

4942809 is a deficient number, since it is larger than the sum of its proper divisors (2379911).

4942809 is a wasteful number, since it uses less digits than its factorization.

4942809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183076 (or 183070 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 4942809 is about 2223.2429017091. The cubic root of 4942809 is about 170.3431247401.

The spelling of 4942809 in words is "four million, nine hundred forty-two thousand, eight hundred nine".