2991443 has 16 divisors (see below), whose sum is σ = 3741696. Its totient is φ = 2328480.

The previous prime is 2991433. The next prime is 2991451. The reversal of 2991443 is 3441992.

It is a happy number.

It is not a de Polignac number, because 2991443 - 2⁸ = 2991187 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6230 + ... + 6692.

It is an arithmetic number, because the mean of its divisors is an integer number (233856).

2^2991443 is an apocalyptic number.

2991443 is a deficient number, since it is larger than the sum of its proper divisors (750253).

2991443 is a wasteful number, since it uses less digits than its factorization.

2991443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554.

The product of its digits is 7776, while the sum is 32.

The square root of 2991443 is about 1729.5788504720. The cubic root of 2991443 is about 144.0877005634.

The spelling of 2991443 in words is "two million, nine hundred ninety-one thousand, four hundred forty-three".