2179642673 has 4 divisors (see below), whose sum is σ = 2347307508. Its totient is φ = 2011977840.

The previous prime is 2179642669. The next prime is 2179642681. The reversal of 2179642673 is 3762469712.

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 141300769 + 2038341904 = 11887^2 + 45148^2 .

It is a cyclic number.

It is not a de Polignac number, because 2179642673 - 2² = 2179642669 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2179642603) 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, 83832398 + ... + 83832423.

It is an arithmetic number, because the mean of its divisors is an integer number (586826877).

Almost surely, 2^2179642673 is an apocalyptic number.

It is an amenable number.

2179642673 is a deficient number, since it is larger than the sum of its proper divisors (167664835).

2179642673 is a wasteful number, since it uses less digits than its factorization.

2179642673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167664834.

The product of its digits is 762048, while the sum is 47.

The square root of 2179642673 is about 46686.6434111513. The cubic root of 2179642673 is about 1296.5674084764.

The spelling of 2179642673 in words is "two billion, one hundred seventy-nine million, six hundred forty-two thousand, six hundred seventy-three".