2173810973 has 4 divisors (see below), whose sum is σ = 2174646780. Its totient is φ = 2172975168.

The previous prime is 2173810931. The next prime is 2173810993. The reversal of 2173810973 is 3790183712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1009841284 + 1163969689 = 31778^2 + 34117^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173810973 - 2⁶ = 2173810909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2173810973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173810993) 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, 413990 + ... + 419207.

It is an arithmetic number, because the mean of its divisors is an integer number (543661695).

Almost surely, 2^2173810973 is an apocalyptic number.

It is an amenable number.

2173810973 is a deficient number, since it is larger than the sum of its proper divisors (835807).

2173810973 is an equidigital number, since it uses as much as digits as its factorization.

2173810973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835806.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 2173810973 is about 46624.1458152318. The cubic root of 2173810973 is about 1295.4100405447.

The spelling of 2173810973 in words is "two billion, one hundred seventy-three million, eight hundred ten thousand, nine hundred seventy-three".