159189073 has 2 divisors, whose sum is σ = 159189074. Its totient is φ = 159189072.

The previous prime is 159189013. The next prime is 159189083. The reversal of 159189073 is 370981951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83028544 + 76160529 = 9112^2 + 8727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159189073 is a prime.

It is not a weakly prime, because it can be changed into another prime (159189013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79594536 + 79594537.

It is an arithmetic number, because the mean of its divisors is an integer number (79594537).

Almost surely, 2^159189073 is an apocalyptic number.

It is an amenable number.

159189073 is a deficient number, since it is larger than the sum of its proper divisors (1).

159189073 is an equidigital number, since it uses as much as digits as its factorization.

159189073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 159189073 is about 12617.0152175544. The cubic root of 159189073 is about 541.9648050657.

The spelling of 159189073 in words is "one hundred fifty-nine million, one hundred eighty-nine thousand, seventy-three".