159243857 has 2 divisors, whose sum is σ = 159243858. Its totient is φ = 159243856.

The previous prime is 159243839. The next prime is 159243863. The reversal of 159243857 is 758342951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144985681 + 14258176 = 12041^2 + 3776^2 .

It is a cyclic number.

It is not a de Polignac number, because 159243857 - 2⁶ = 159243793 is a prime.

It is a super-5 number, since 5×159243857⁵ (a number of 42 digits) contains 55555 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (159243827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79621928 + 79621929.

It is an arithmetic number, because the mean of its divisors is an integer number (79621929).

Almost surely, 2^159243857 is an apocalyptic number.

It is an amenable number.

159243857 is a deficient number, since it is larger than the sum of its proper divisors (1).

159243857 is an equidigital number, since it uses as much as digits as its factorization.

159243857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 44.

The square root of 159243857 is about 12619.1860672549. The cubic root of 159243857 is about 542.0269692875.

The spelling of 159243857 in words is "one hundred fifty-nine million, two hundred forty-three thousand, eight hundred fifty-seven".