2743891 has 4 divisors (see below), whose sum is σ = 2759400. Its totient is φ = 2728384.

The previous prime is 2743861. The next prime is 2743901. The reversal of 2743891 is 1983472.

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

It is a cyclic number.

It is not a de Polignac number, because 2743891 - 2⁵ = 2743859 is a prime.

It is a Duffinian number.

2743891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2743861) 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, 7486 + ... + 7843.

It is an arithmetic number, because the mean of its divisors is an integer number (689850).

2^2743891 is an apocalyptic number.

2743891 is a deficient number, since it is larger than the sum of its proper divisors (15509).

2743891 is a wasteful number, since it uses less digits than its factorization.

2743891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15508.

The product of its digits is 12096, while the sum is 34.

The square root of 2743891 is about 1656.4694382934. The cubic root of 2743891 is about 139.9981462340.

The spelling of 2743891 in words is "two million, seven hundred forty-three thousand, eight hundred ninety-one".