159920489 has 2 divisors, whose sum is σ = 159920490. Its totient is φ = 159920488.

The previous prime is 159920437. The next prime is 159920533. The reversal of 159920489 is 984029951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155426089 + 4494400 = 12467^2 + 2120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159920489 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (159920419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79960244 + 79960245.

It is an arithmetic number, because the mean of its divisors is an integer number (79960245).

Almost surely, 2^159920489 is an apocalyptic number.

It is an amenable number.

159920489 is a deficient number, since it is larger than the sum of its proper divisors (1).

159920489 is an equidigital number, since it uses as much as digits as its factorization.

159920489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 159920489 is about 12645.9673018714. The cubic root of 159920489 is about 542.7935808939.

The spelling of 159920489 in words is "one hundred fifty-nine million, nine hundred twenty thousand, four hundred eighty-nine".