212168839 has 8 divisors (see below), whose sum is σ = 223759280. Its totient is φ = 200620800.

The previous prime is 212168807. The next prime is 212168849. The reversal of 212168839 is 938861212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212168839 - 2⁵ = 212168807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212168849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42 + ... + 20599.

It is an arithmetic number, because the mean of its divisors is an integer number (27969910).

Almost surely, 2^212168839 is an apocalyptic number.

212168839 is a deficient number, since it is larger than the sum of its proper divisors (11590441).

212168839 is a wasteful number, since it uses less digits than its factorization.

212168839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21201.

The product of its digits is 41472, while the sum is 40.

The square root of 212168839 is about 14566.0165796967. The cubic root of 212168839 is about 596.4314464912.

The spelling of 212168839 in words is "two hundred twelve million, one hundred sixty-eight thousand, eight hundred thirty-nine".