159989689 has 2 divisors, whose sum is σ = 159989690. Its totient is φ = 159989688.

The previous prime is 159989677. The next prime is 159989699. The reversal of 159989689 is 986989951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122877225 + 37112464 = 11085^2 + 6092^2 .

It is a cyclic number.

It is not a de Polignac number, because 159989689 - 2⁵ = 159989657 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 159989689.

It is not a weakly prime, because it can be changed into another prime (159989639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79994844 + 79994845.

It is an arithmetic number, because the mean of its divisors is an integer number (79994845).

Almost surely, 2^159989689 is an apocalyptic number.

It is an amenable number.

159989689 is a deficient number, since it is larger than the sum of its proper divisors (1).

159989689 is an equidigital number, since it uses as much as digits as its factorization.

159989689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12597120, while the sum is 64.

The square root of 159989689 is about 12648.7030560449. The cubic root of 159989689 is about 542.8718612518.

The spelling of 159989689 in words is "one hundred fifty-nine million, nine hundred eighty-nine thousand, six hundred eighty-nine".