213628189 has 2 divisors, whose sum is σ = 213628190. Its totient is φ = 213628188.

The previous prime is 213628183. The next prime is 213628193. The reversal of 213628189 is 981826312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200364025 + 13264164 = 14155^2 + 3642^2 .

It is a cyclic number.

It is not a de Polignac number, because 213628189 - 2⁷ = 213628061 is a prime.

It is equal to p_11790697 and since 213628189 and 11790697 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213628183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106814094 + 106814095.

It is an arithmetic number, because the mean of its divisors is an integer number (106814095).

Almost surely, 2^213628189 is an apocalyptic number.

It is an amenable number.

213628189 is a deficient number, since it is larger than the sum of its proper divisors (1).

213628189 is an equidigital number, since it uses as much as digits as its factorization.

213628189 is an odious number, because the sum of its binary digits is odd.

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

The square root of 213628189 is about 14616.0250752385. The cubic root of 213628189 is about 597.7957910579.

The spelling of 213628189 in words is "two hundred thirteen million, six hundred twenty-eight thousand, one hundred eighty-nine".