2173009807 has 4 divisors (see below), whose sum is σ = 2173170136. Its totient is φ = 2172849480.

The previous prime is 2173009789. The next prime is 2173009829. The reversal of 2173009807 is 7089003712.

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

It is a cyclic number.

It is not a de Polignac number, because 2173009807 - 2¹⁵ = 2172977039 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 (2173009837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57744 + ... + 87637.

It is an arithmetic number, because the mean of its divisors is an integer number (543292534).

Almost surely, 2^2173009807 is an apocalyptic number.

2173009807 is a deficient number, since it is larger than the sum of its proper divisors (160329).

2173009807 is a wasteful number, since it uses less digits than its factorization.

2173009807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160328.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 2173009807 is about 46615.5532735588. The cubic root of 2173009807 is about 1295.2508782840.

The spelling of 2173009807 in words is "two billion, one hundred seventy-three million, nine thousand, eight hundred seven".