2197791 has 6 divisors (see below), whose sum is σ = 3174600. Its totient is φ = 1465188.

The previous prime is 2197781. The next prime is 2197799. The reversal of 2197791 is 1977912.

It is not a de Polignac number, because 2197791 - 2⁵ = 2197759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122091 + ... + 122108.

It is an arithmetic number, because the mean of its divisors is an integer number (529100).

2^2197791 is an apocalyptic number.

2197791 is a deficient number, since it is larger than the sum of its proper divisors (976809).

2197791 is a wasteful number, since it uses less digits than its factorization.

2197791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244205 (or 244202 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 2197791 is about 1482.4948566521. The cubic root of 2197791 is about 130.0155997059.

The spelling of 2197791 in words is "two million, one hundred ninety-seven thousand, seven hundred ninety-one".