212019789 has 4 divisors (see below), whose sum is σ = 282693056. Its totient is φ = 141346524.

The previous prime is 212019761. The next prime is 212019791. The reversal of 212019789 is 987910212.

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 not a de Polignac number, because 212019789 - 2²¹ = 209922637 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 (212019739) 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 3 ways as a sum of consecutive naturals, for example, 35336629 + ... + 35336634.

It is an arithmetic number, because the mean of its divisors is an integer number (70673264).

Almost surely, 2^212019789 is an apocalyptic number.

It is an amenable number.

212019789 is a deficient number, since it is larger than the sum of its proper divisors (70673267).

212019789 is an equidigital number, since it uses as much as digits as its factorization.

212019789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70673266.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 212019789 is about 14560.8993197536. The cubic root of 212019789 is about 596.2917481064.

The spelling of 212019789 in words is "two hundred twelve million, nineteen thousand, seven hundred eighty-nine".