213707189 has 2 divisors, whose sum is σ = 213707190. Its totient is φ = 213707188.

The previous prime is 213707161. The next prime is 213707203. The reversal of 213707189 is 981707312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164916964 + 48790225 = 12842^2 + 6985^2 .

It is a cyclic number.

It is not a de Polignac number, because 213707189 - 2¹⁶ = 213641653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213707159) 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, 106853594 + 106853595.

It is an arithmetic number, because the mean of its divisors is an integer number (106853595).

Almost surely, 2^213707189 is an apocalyptic number.

It is an amenable number.

213707189 is a deficient number, since it is larger than the sum of its proper divisors (1).

213707189 is an equidigital number, since it uses as much as digits as its factorization.

213707189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 213707189 is about 14618.7273385887. The cubic root of 213707189 is about 597.8694705467.

The spelling of 213707189 in words is "two hundred thirteen million, seven hundred seven thousand, one hundred eighty-nine".