2016891 has 12 divisors (see below), whose sum is σ = 3007680. Its totient is φ = 1301040.

The previous prime is 2016881. The next prime is 2016919. The reversal of 2016891 is 1986102.

It is not a de Polignac number, because 2016891 - 2¹⁵ = 1984123 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2016821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3336 + ... + 3893.

It is an arithmetic number, because the mean of its divisors is an integer number (250640).

2^2016891 is an apocalyptic number.

2016891 is a deficient number, since it is larger than the sum of its proper divisors (990789).

2016891 is a wasteful number, since it uses less digits than its factorization.

2016891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7266 (or 7263 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2016891 is about 1420.1728768006. The cubic root of 2016891 is about 126.3457999144.

The spelling of 2016891 in words is "two million, sixteen thousand, eight hundred ninety-one".