2172971099 has 8 divisors (see below), whose sum is σ = 2340493680. Its totient is φ = 2005501536.

The previous prime is 2172971089. The next prime is 2172971137. The reversal of 2172971099 is 9901792712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2172971099 - 2¹⁶ = 2172905563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172971089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126572 + ... + 142710.

It is an arithmetic number, because the mean of its divisors is an integer number (292561710).

Almost surely, 2^2172971099 is an apocalyptic number.

2172971099 is a deficient number, since it is larger than the sum of its proper divisors (167522581).

2172971099 is a wasteful number, since it uses less digits than its factorization.

2172971099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26509.

The product of its (nonzero) digits is 142884, while the sum is 47.

The square root of 2172971099 is about 46615.1380883936. The cubic root of 2172971099 is about 1295.2431874353.

The spelling of 2172971099 in words is "two billion, one hundred seventy-two million, nine hundred seventy-one thousand, ninety-nine".