2808913 has 4 divisors (see below), whose sum is σ = 2836288. Its totient is φ = 2781540.

The previous prime is 2808901. The next prime is 2808917. The reversal of 2808913 is 3198082.

2808913 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2808913 - 2⁵ = 2808881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2808917) 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, 13533 + ... + 13738.

It is an arithmetic number, because the mean of its divisors is an integer number (709072).

2^2808913 is an apocalyptic number.

It is an amenable number.

2808913 is a deficient number, since it is larger than the sum of its proper divisors (27375).

2808913 is a wasteful number, since it uses less digits than its factorization.

2808913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27374.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 2808913 is about 1675.9812051452. The cubic root of 2808913 is about 141.0953699808.

It can be divided in two parts, 2808 and 913, that added together give a square (3721 = 61²).

The spelling of 2808913 in words is "two million, eight hundred eight thousand, nine hundred thirteen".