2805913 has 4 divisors (see below), whose sum is σ = 3061008. Its totient is φ = 2550820.

The previous prime is 2805911. The next prime is 2805923. The reversal of 2805913 is 3195082.

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 2805913 - 2¹ = 2805911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2805911) 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, 127531 + ... + 127552.

It is an arithmetic number, because the mean of its divisors is an integer number (765252).

2^2805913 is an apocalyptic number.

It is an amenable number.

2805913 is a deficient number, since it is larger than the sum of its proper divisors (255095).

2805913 is a wasteful number, since it uses less digits than its factorization.

2805913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255094.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 2805913 is about 1675.0859679431. The cubic root of 2805913 is about 141.0451207808.

The spelling of 2805913 in words is "two million, eight hundred five thousand, nine hundred thirteen".