2991543 has 8 divisors (see below), whose sum is σ = 3998208. Its totient is φ = 1989624.

The previous prime is 2991523. The next prime is 2991551. The reversal of 2991543 is 3451992.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2991543 - 2⁵ = 2991511 is a prime.

It is a Smith number, since the sum of its digits (33) 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 (2991523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730 + ... + 2552.

It is an arithmetic number, because the mean of its divisors is an integer number (499776).

2^2991543 is an apocalyptic number.

2991543 is a deficient number, since it is larger than the sum of its proper divisors (1006665).

2991543 is a wasteful number, since it uses less digits than its factorization.

2991543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373.

The product of its digits is 9720, while the sum is 33.

The square root of 2991543 is about 1729.6077590020. The cubic root of 2991543 is about 144.0893060995.

The spelling of 2991543 in words is "two million, nine hundred ninety-one thousand, five hundred forty-three".