212907789 has 12 divisors (see below), whose sum is σ = 307709376. Its totient is φ = 141857352.

The previous prime is 212907781. The next prime is 212907809. The reversal of 212907789 is 987709212.

212907789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212907789 - 2³ = 212907781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212907781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12834 + ... + 24300.

It is an arithmetic number, because the mean of its divisors is an integer number (25642448).

Almost surely, 2^212907789 is an apocalyptic number.

It is an amenable number.

212907789 is a deficient number, since it is larger than the sum of its proper divisors (94801587).

212907789 is a wasteful number, since it uses less digits than its factorization.

212907789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13536 (or 13533 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 212907789 is about 14591.3600805408. The cubic root of 212907789 is about 597.1230691627.

The spelling of 212907789 in words is "two hundred twelve million, nine hundred seven thousand, seven hundred eighty-nine".