2179091 has 4 divisors (see below), whose sum is σ = 2293800. Its totient is φ = 2064384.

The previous prime is 2179063. The next prime is 2179097. The reversal of 2179091 is 1909712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2179091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2179097) 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, 57326 + ... + 57363.

It is an arithmetic number, because the mean of its divisors is an integer number (573450).

2^2179091 is an apocalyptic number.

2179091 is a deficient number, since it is larger than the sum of its proper divisors (114709).

2179091 is a wasteful number, since it uses less digits than its factorization.

2179091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114708.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 2179091 is about 1476.1744476856. The cubic root of 2179091 is about 129.6458011097.

The spelling of 2179091 in words is "two million, one hundred seventy-nine thousand, ninety-one".