2172469689 has 24 divisors (see below), whose sum is σ = 3470739272. Its totient is φ = 1300769280.

The previous prime is 2172469687. The next prime is 2172469697. The reversal of 2172469689 is 9869642712.

2172469689 is a `hidden beast` number, since 2 + 172 + 469 + 6 + 8 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11614464 + 2160855225 = 3408^2 + 46485^2 .

It is not a de Polignac number, because 2172469689 - 2¹ = 2172469687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2172469681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246592 + ... + 255249.

Almost surely, 2^2172469689 is an apocalyptic number.

It is an amenable number.

2172469689 is a deficient number, since it is larger than the sum of its proper divisors (1298269583).

2172469689 is a wasteful number, since it uses less digits than its factorization.

2172469689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501897 (or 501894 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 2172469689 is about 46609.7595895967. The cubic root of 2172469689 is about 1295.1435545952.

The spelling of 2172469689 in words is "two billion, one hundred seventy-two million, four hundred sixty-nine thousand, six hundred eighty-nine".