2891943 has 14 divisors (see below), whose sum is σ = 4337024. Its totient is φ = 1927476.

The previous prime is 2891929. The next prime is 2891963. The reversal of 2891943 is 3491982.

It is not a de Polignac number, because 2891943 - 2⁴ = 2891927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2891898 and 2891907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891963) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1255 + ... + 2712.

2^2891943 is an apocalyptic number.

2891943 is a deficient number, since it is larger than the sum of its proper divisors (1445081).

2891943 is an frugal number, since it uses more digits than its factorization.

2891943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985 (or 3970 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 2891943 is about 1700.5713745680. The cubic root of 2891943 is about 142.4721275126.

The spelling of 2891943 in words is "two million, eight hundred ninety-one thousand, nine hundred forty-three".