2873991 has 8 divisors (see below), whose sum is σ = 3921280. Its totient is φ = 1871352.

The previous prime is 2873989. The next prime is 2873999. The reversal of 2873991 is 1993782.

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

It is not a de Polignac number, because 2873991 - 2¹ = 2873989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2873999) 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 7 ways as a sum of consecutive naturals, for example, 11011 + ... + 11268.

It is an arithmetic number, because the mean of its divisors is an integer number (490160).

2^2873991 is an apocalyptic number.

2873991 is a deficient number, since it is larger than the sum of its proper divisors (1047289).

2873991 is a wasteful number, since it uses less digits than its factorization.

2873991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22325.

The product of its digits is 27216, while the sum is 39.

The square root of 2873991 is about 1695.2849318035. The cubic root of 2873991 is about 142.1767124851.

It can be divided in two parts, 287 and 3991, that added together give a triangular number (4278 = T₉₂).

The spelling of 2873991 in words is "two million, eight hundred seventy-three thousand, nine hundred ninety-one".