2171973 has 16 divisors (see below), whose sum is σ = 3009600. Its totient is φ = 1392384.

The previous prime is 2171963. The next prime is 2171977. The reversal of 2171973 is 3791712.

It is not a de Polignac number, because 2171973 - 2⁵ = 2171941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2171973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14503 + ... + 14651.

It is an arithmetic number, because the mean of its divisors is an integer number (188100).

2^2171973 is an apocalyptic number.

It is an amenable number.

2171973 is a deficient number, since it is larger than the sum of its proper divisors (837627).

2171973 is a wasteful number, since it uses less digits than its factorization.

2171973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308.

The product of its digits is 2646, while the sum is 30.

The square root of 2171973 is about 1473.7615139499. The cubic root of 2171973 is about 129.5044844727.

The spelling of 2171973 in words is "two million, one hundred seventy-one thousand, nine hundred seventy-three".