320609189 has 2 divisors, whose sum is σ = 320609190. Its totient is φ = 320609188.

The previous prime is 320609143. The next prime is 320609197. The reversal of 320609189 is 981906023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320589025 + 20164 = 17905^2 + 142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320609189 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 (320659189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160304594 + 160304595.

It is an arithmetic number, because the mean of its divisors is an integer number (160304595).

Almost surely, 2^320609189 is an apocalyptic number.

It is an amenable number.

320609189 is a deficient number, since it is larger than the sum of its proper divisors (1).

320609189 is an equidigital number, since it uses as much as digits as its factorization.

320609189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 320609189 is about 17905.5630740840. The cubic root of 320609189 is about 684.4241445884.

The spelling of 320609189 in words is "three hundred twenty million, six hundred nine thousand, one hundred eighty-nine".