2881987 has 4 divisors (see below), whose sum is σ = 2889576. Its totient is φ = 2874400.

The previous prime is 2881951. The next prime is 2882021. The reversal of 2881987 is 7891882.

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 2881987 - 2⁷ = 2881859 is a prime.

It is a Duffinian number.

2881987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2881937) 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, 3193 + ... + 3994.

It is an arithmetic number, because the mean of its divisors is an integer number (722394).

2^2881987 is an apocalyptic number.

2881987 is a deficient number, since it is larger than the sum of its proper divisors (7589).

2881987 is an equidigital number, since it uses as much as digits as its factorization.

2881987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7588.

The product of its digits is 64512, while the sum is 43.

The square root of 2881987 is about 1697.6415993961. The cubic root of 2881987 is about 142.3084447826.

The spelling of 2881987 in words is "two million, eight hundred eighty-one thousand, nine hundred eighty-seven".