2868909 has 4 divisors (see below), whose sum is σ = 3825216. Its totient is φ = 1912604.

The previous prime is 2868871. The next prime is 2868919. The reversal of 2868909 is 9098682.

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-2868909 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2868919) 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, 478149 + ... + 478154.

It is an arithmetic number, because the mean of its divisors is an integer number (956304).

2^2868909 is an apocalyptic number.

It is an amenable number.

2868909 is a deficient number, since it is larger than the sum of its proper divisors (956307).

2868909 is an equidigital number, since it uses as much as digits as its factorization.

2868909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956306.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 2868909 is about 1693.7854055340. The cubic root of 2868909 is about 142.0928606388.

The spelling of 2868909 in words is "two million, eight hundred sixty-eight thousand, nine hundred nine".