2179929289 has 4 divisors (see below), whose sum is σ = 2180077956. Its totient is φ = 2179780624.

The previous prime is 2179929263. The next prime is 2179929293. The reversal of 2179929289 is 9829299712.

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 265429264 + 1914500025 = 16292^2 + 43755^2 .

It is a cyclic number.

It is not a de Polignac number, because 2179929289 - 2¹⁹ = 2179405001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2179929589) 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, 49594 + ... + 82579.

It is an arithmetic number, because the mean of its divisors is an integer number (545019489).

Almost surely, 2^2179929289 is an apocalyptic number.

It is an amenable number.

2179929289 is a deficient number, since it is larger than the sum of its proper divisors (148667).

2179929289 is a wasteful number, since it uses less digits than its factorization.

2179929289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148666.

The product of its digits is 2939328, while the sum is 58.

The square root of 2179929289 is about 46689.7128819615. The cubic root of 2179929289 is about 1296.6242374667.

The spelling of 2179929289 in words is "two billion, one hundred seventy-nine million, nine hundred twenty-nine thousand, two hundred eighty-nine".