2097191 has 4 divisors (see below), whose sum is σ = 2148384. Its totient is φ = 2046000.

The previous prime is 2097169. The next prime is 2097211. The reversal of 2097191 is 1917902.

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 2097191 - 2¹⁴ = 2080807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2097131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25535 + ... + 25616.

It is an arithmetic number, because the mean of its divisors is an integer number (537096).

2^2097191 is an apocalyptic number.

2097191 is a deficient number, since it is larger than the sum of its proper divisors (51193).

2097191 is an equidigital number, since it uses as much as digits as its factorization.

2097191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51192.

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

The square root of 2097191 is about 1448.1681532198. The cubic root of 2097191 is about 128.0007934521. Note that the first 3 decimals are identical.

The spelling of 2097191 in words is "two million, ninety-seven thousand, one hundred ninety-one".