212768889 has 16 divisors (see below), whose sum is σ = 301242240. Its totient is φ = 133118720.

The previous prime is 212768873. The next prime is 212768891. The reversal of 212768889 is 988867212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212768889 - 2⁴ = 212768873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212768849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12499 + ... + 24119.

It is an arithmetic number, because the mean of its divisors is an integer number (18827640).

Almost surely, 2^212768889 is an apocalyptic number.

It is an amenable number.

212768889 is a deficient number, since it is larger than the sum of its proper divisors (88473351).

212768889 is a wasteful number, since it uses less digits than its factorization.

212768889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12000.

The product of its digits is 774144, while the sum is 51.

The square root of 212768889 is about 14586.5996380239. The cubic root of 212768889 is about 596.9931875241.

The spelling of 212768889 in words is "two hundred twelve million, seven hundred sixty-eight thousand, eight hundred eighty-nine".