212374189 has 2 divisors, whose sum is σ = 212374190. Its totient is φ = 212374188.

The previous prime is 212374181. The next prime is 212374213. The reversal of 212374189 is 981473212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176013289 + 36360900 = 13267^2 + 6030^2 .

It is a cyclic number.

It is not a de Polignac number, because 212374189 - 2³ = 212374181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212374181) 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 as a sum of consecutive naturals, namely, 106187094 + 106187095.

It is an arithmetic number, because the mean of its divisors is an integer number (106187095).

Almost surely, 2^212374189 is an apocalyptic number.

It is an amenable number.

212374189 is a deficient number, since it is larger than the sum of its proper divisors (1).

212374189 is an equidigital number, since it uses as much as digits as its factorization.

212374189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 212374189 is about 14573.0638165075. The cubic root of 212374189 is about 596.6238054096.

The spelling of 212374189 in words is "two hundred twelve million, three hundred seventy-four thousand, one hundred eighty-nine".