2091187 has 8 divisors (see below), whose sum is σ = 2530656. Its totient is φ = 1686912.

The previous prime is 2091151. The next prime is 2091191. The reversal of 2091187 is 7811902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2091187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2091487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8668 + ... + 8905.

It is an arithmetic number, because the mean of its divisors is an integer number (316332).

2^2091187 is an apocalyptic number.

2091187 is a deficient number, since it is larger than the sum of its proper divisors (439469).

2091187 is a wasteful number, since it uses less digits than its factorization.

2091187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17597.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 2091187 is about 1446.0937037412. The cubic root of 2091187 is about 127.8785265211.

It can be divided in two parts, 2091 and 187, that added together give a triangular number (2278 = T₆₇).

The spelling of 2091187 in words is "two million, ninety-one thousand, one hundred eighty-seven".