2949809 has 4 divisors (see below), whose sum is σ = 2993904. Its totient is φ = 2905716.

The previous prime is 2949803. The next prime is 2949839. The reversal of 2949809 is 9089492.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2949809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2949803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21947 + ... + 22080.

It is an arithmetic number, because the mean of its divisors is an integer number (748476).

2^2949809 is an apocalyptic number.

It is an amenable number.

2949809 is a deficient number, since it is larger than the sum of its proper divisors (44095).

2949809 is an equidigital number, since it uses as much as digits as its factorization.

2949809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44094.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 2949809 is about 1717.5008005821. The cubic root of 2949809 is about 143.4161188728.

The spelling of 2949809 in words is "two million, nine hundred forty-nine thousand, eight hundred nine".