2909873 has 4 divisors (see below), whose sum is σ = 3081060. Its totient is φ = 2738688.

The previous prime is 2909867. The next prime is 2909909. The reversal of 2909873 is 3789092.

2909873 is digitally balanced in base 2, 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 1227664 + 1682209 = 1108^2 + 1297^2 .

It is a cyclic number.

It is not a de Polignac number, because 2909873 - 2⁸ = 2909617 is a prime.

It is a super-2 number, since 2×2909873² = 16934721752258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2909813) 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, 85568 + ... + 85601.

It is an arithmetic number, because the mean of its divisors is an integer number (770265).

2^2909873 is an apocalyptic number.

It is an amenable number.

2909873 is a deficient number, since it is larger than the sum of its proper divisors (171187).

2909873 is a wasteful number, since it uses less digits than its factorization.

2909873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171186.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 2909873 is about 1705.8349861578. The cubic root of 2909873 is about 142.7659627204.

The spelling of 2909873 in words is "two million, nine hundred nine thousand, eight hundred seventy-three".