2991343 has 4 divisors (see below), whose sum is σ = 3008808. Its totient is φ = 2973880.

The previous prime is 2991299. The next prime is 2991353. The reversal of 2991343 is 3431992.

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 2991343 - 2⁹ = 2990831 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991353) 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, 8473 + ... + 8818.

It is an arithmetic number, because the mean of its divisors is an integer number (752202).

2^2991343 is an apocalyptic number.

2991343 is a deficient number, since it is larger than the sum of its proper divisors (17465).

2991343 is a wasteful number, since it uses less digits than its factorization.

2991343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17464.

The product of its digits is 5832, while the sum is 31.

The square root of 2991343 is about 1729.5499414588. The cubic root of 2991343 is about 144.0860949914.

The spelling of 2991343 in words is "two million, nine hundred ninety-one thousand, three hundred forty-three".