2291697 has 12 divisors (see below), whose sum is σ = 3454464. Its totient is φ = 1461240.

The previous prime is 2291683. The next prime is 2291699. The reversal of 2291697 is 7961922.

It is not a de Polignac number, because 2291697 - 2¹¹ = 2289649 is a prime.

It is an Ulam number.

2291697 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2291699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5329 + ... + 5742.

It is an arithmetic number, because the mean of its divisors is an integer number (287872).

2^2291697 is an apocalyptic number.

It is an amenable number.

2291697 is a deficient number, since it is larger than the sum of its proper divisors (1162767).

2291697 is a wasteful number, since it uses less digits than its factorization.

2291697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11100 (or 11097 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 2291697 is about 1513.8351957859. The cubic root of 2291697 is about 131.8415799203.

It can be divided in two parts, 22 and 91697, that added together give a palindrome (91719).

The spelling of 2291697 in words is "two million, two hundred ninety-one thousand, six hundred ninety-seven".