320659189 has 2 divisors, whose sum is σ = 320659190. Its totient is φ = 320659188.

The previous prime is 320659147. The next prime is 320659193. The reversal of 320659189 is 981956023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314778564 + 5880625 = 17742^2 + 2425^2 .

It is a cyclic number.

It is not a de Polignac number, because 320659189 - 2⁹ = 320658677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320659109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160329594 + 160329595.

It is an arithmetic number, because the mean of its divisors is an integer number (160329595).

Almost surely, 2^320659189 is an apocalyptic number.

It is an amenable number.

320659189 is a deficient number, since it is larger than the sum of its proper divisors (1).

320659189 is an equidigital number, since it uses as much as digits as its factorization.

320659189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 320659189 is about 17906.9592337728. The cubic root of 320659189 is about 684.4597220969.

The spelling of 320659189 in words is "three hundred twenty million, six hundred fifty-nine thousand, one hundred eighty-nine".