2891187 has 16 divisors (see below), whose sum is σ = 4613280. Its totient is φ = 1778976.

The previous prime is 2891171. The next prime is 2891201. The reversal of 2891187 is 7811982.

It is not a de Polignac number, because 2891187 - 2⁴ = 2891171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2891137) 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, 3768 + ... + 4469.

It is an arithmetic number, because the mean of its divisors is an integer number (288330).

2^2891187 is an apocalyptic number.

2891187 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2891187 is a deficient number, since it is larger than the sum of its proper divisors (1722093).

2891187 is a wasteful number, since it uses less digits than its factorization.

2891187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8259 (or 8253 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 2891187 is about 1700.3490818064. The cubic root of 2891187 is about 142.4597116022.

The spelling of 2891187 in words is "two million, eight hundred ninety-one thousand, one hundred eighty-seven".