2189091 has 8 divisors (see below), whose sum is σ = 2962624. Its totient is φ = 1437480.

The previous prime is 2189081. The next prime is 2189101. The reversal of 2189091 is 1909812.

It is an interprime number because it is at equal distance from previous prime (2189081) and next prime (2189101).

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

It is not a de Polignac number, because 2189091 - 2⁶ = 2189027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2189021) 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, 5245 + ... + 5646.

It is an arithmetic number, because the mean of its divisors is an integer number (370328).

2^2189091 is an apocalyptic number.

2189091 is a deficient number, since it is larger than the sum of its proper divisors (773533).

2189091 is a wasteful number, since it uses less digits than its factorization.

2189091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10961.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 2189091 is about 1479.5577041805. The cubic root of 2189091 is about 129.8438163790.

The spelling of 2189091 in words is "two million, one hundred eighty-nine thousand, ninety-one".