2097591 has 4 divisors (see below), whose sum is σ = 2796792. Its totient is φ = 1398392.

The previous prime is 2097559. The next prime is 2097593. The reversal of 2097591 is 1957902.

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 2097591 - 2⁵ = 2097559 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 0 + 9 + 7³ + 5 + 9² + 1 .

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2097593) 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, 349596 + ... + 349601.

It is an arithmetic number, because the mean of its divisors is an integer number (699198).

2^2097591 is an apocalyptic number.

2097591 is a deficient number, since it is larger than the sum of its proper divisors (699201).

2097591 is an equidigital number, since it uses as much as digits as its factorization.

2097591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699200.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 2097591 is about 1448.3062521442. The cubic root of 2097591 is about 128.0089308547.

The spelling of 2097591 in words is "two million, ninety-seven thousand, five hundred ninety-one".