212670869 has 4 divisors (see below), whose sum is σ = 216275520. Its totient is φ = 209066220.

The previous prime is 212670847. The next prime is 212670907. The reversal of 212670869 is 968076212.

212670869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212670869 - 2⁸ = 212670613 is a prime.

It is a super-2 number, since 2×212670869² = 90457797042430322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212670839) 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, 1802237 + ... + 1802354.

It is an arithmetic number, because the mean of its divisors is an integer number (54068880).

Almost surely, 2^212670869 is an apocalyptic number.

It is an amenable number.

212670869 is a deficient number, since it is larger than the sum of its proper divisors (3604651).

212670869 is an equidigital number, since it uses as much as digits as its factorization.

212670869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604650.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 212670869 is about 14583.2393177922. The cubic root of 212670869 is about 596.9014976459.

The spelling of 212670869 in words is "two hundred twelve million, six hundred seventy thousand, eight hundred sixty-nine".