2091597 has 8 divisors (see below), whose sum is σ = 2910144. Its totient is φ = 1333728.

The previous prime is 2091587. The next prime is 2091599. The reversal of 2091597 is 7951902.

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

It is not a de Polignac number, because 2091597 - 2⁴ = 2091581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091599) 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, 15088 + ... + 15225.

It is an arithmetic number, because the mean of its divisors is an integer number (363768).

2^2091597 is an apocalyptic number.

It is an amenable number.

2091597 is a deficient number, since it is larger than the sum of its proper divisors (818547).

2091597 is a wasteful number, since it uses less digits than its factorization.

2091597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30339.

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

The square root of 2091597 is about 1446.2354580081. The cubic root of 2091597 is about 127.8868833012.

It can be divided in two parts, 20915 and 97, that added together give a palindrome (21012).

The spelling of 2091597 in words is "two million, ninety-one thousand, five hundred ninety-seven".