2088691 has 4 divisors (see below), whose sum is σ = 2278584. Its totient is φ = 1898800.

The previous prime is 2088683. The next prime is 2088703. The reversal of 2088691 is 1968802.

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

It is a cyclic number.

It is not a de Polignac number, because 2088691 - 2³ = 2088683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2088601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94930 + ... + 94951.

It is an arithmetic number, because the mean of its divisors is an integer number (569646).

2^2088691 is an apocalyptic number.

2088691 is a deficient number, since it is larger than the sum of its proper divisors (189893).

2088691 is a wasteful number, since it uses less digits than its factorization.

2088691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189892.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 2088691 is about 1445.2304314538. The cubic root of 2088691 is about 127.8276284940.

The spelling of 2088691 in words is "two million, eighty-eight thousand, six hundred ninety-one".