2217874689 has 20 divisors (see below), whose sum is σ = 3508013124. Its totient is φ = 1391606784.

The previous prime is 2217874651. The next prime is 2217874691. The reversal of 2217874689 is 9864787122.

It is a happy number.

2217874689 is a `hidden beast` number, since 2 + 2 + 178 + 7 + 468 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1553936400 + 663938289 = 39420^2 + 25767^2 .

It is not a de Polignac number, because 2217874689 - 2⁸ = 2217874433 is a prime.

It is a super-2 number, since 2×2217874689² = 9837936272213693442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2217874649) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 803952 + ... + 806705.

Almost surely, 2^2217874689 is an apocalyptic number.

It is an amenable number.

2217874689 is a deficient number, since it is larger than the sum of its proper divisors (1290138435).

2217874689 is a wasteful number, since it uses less digits than its factorization.

2217874689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610686 (or 1610677 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 2217874689 is about 47094.3169501374. The cubic root of 2217874689 is about 1304.1043239659.

The spelling of 2217874689 in words is "two billion, two hundred seventeen million, eight hundred seventy-four thousand, six hundred eighty-nine".