2171797 has 4 divisors (see below), whose sum is σ = 2181760. Its totient is φ = 2161836.

The previous prime is 2171777. The next prime is 2171831. The reversal of 2171797 is 7971712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2171797 - 2¹¹ = 2169749 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 (2171707) 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, 4647 + ... + 5092.

It is an arithmetic number, because the mean of its divisors is an integer number (545440).

2^2171797 is an apocalyptic number.

It is an amenable number.

2171797 is a deficient number, since it is larger than the sum of its proper divisors (9963).

2171797 is an equidigital number, since it uses as much as digits as its factorization.

2171797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9962.

The product of its digits is 6174, while the sum is 34.

The square root of 2171797 is about 1473.7018015867. The cubic root of 2171797 is about 129.5009863622.

The spelling of 2171797 in words is "two million, one hundred seventy-one thousand, seven hundred ninety-seven".