212419989 has 10 divisors (see below), whose sum is σ = 317318870. Its totient is φ = 141613272.

The previous prime is 212419969. The next prime is 212419993. The reversal of 212419989 is 989914212.

It can be written as a sum of positive squares in only one way, i.e., 191351889 + 21068100 = 13833^2 + 4590^2 .

It is not a de Polignac number, because 212419989 - 2¹² = 212415893 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 (212419969) 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 9 ways as a sum of consecutive naturals, for example, 1311154 + ... + 1311315.

It is an arithmetic number, because the mean of its divisors is an integer number (31731887).

Almost surely, 2^212419989 is an apocalyptic number.

It is an amenable number.

212419989 is a deficient number, since it is larger than the sum of its proper divisors (104898881).

212419989 is an equidigital number, since it uses as much as digits as its factorization.

212419989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622481 (or 2622472 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 212419989 is about 14574.6351240777. The cubic root of 212419989 is about 596.6666910452. Note that the first 4 decimals are identical.

The spelling of 212419989 in words is "two hundred twelve million, four hundred nineteen thousand, nine hundred eighty-nine".