2791867 has 4 divisors (see below), whose sum is σ = 3006640. Its totient is φ = 2577096.

The previous prime is 2791849. The next prime is 2791897. The reversal of 2791867 is 7681972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2791867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2791807) 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, 107367 + ... + 107392.

It is an arithmetic number, because the mean of its divisors is an integer number (751660).

2^2791867 is an apocalyptic number.

2791867 is a deficient number, since it is larger than the sum of its proper divisors (214773).

2791867 is a wasteful number, since it uses less digits than its factorization.

2791867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214772.

The product of its digits is 42336, while the sum is 40.

The square root of 2791867 is about 1670.8880872159. Note that the first 3 decimals coincide. The cubic root of 2791867 is about 140.8093763933.

The spelling of 2791867 in words is "two million, seven hundred ninety-one thousand, eight hundred sixty-seven".