159800681 has 2 divisors, whose sum is σ = 159800682. Its totient is φ = 159800680.

The previous prime is 159800633. The next prime is 159800713. The reversal of 159800681 is 186008951.

159800681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109390681 + 50410000 = 10459^2 + 7100^2 .

It is a cyclic number.

It is not a de Polignac number, because 159800681 - 2⁶ = 159800617 is a prime.

It is a super-2 number, since 2×159800681² = 51072515296127522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (159800881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79900340 + 79900341.

It is an arithmetic number, because the mean of its divisors is an integer number (79900341).

Almost surely, 2^159800681 is an apocalyptic number.

It is an amenable number.

159800681 is a deficient number, since it is larger than the sum of its proper divisors (1).

159800681 is an equidigital number, since it uses as much as digits as its factorization.

159800681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 159800681 is about 12641.2294101484. The cubic root of 159800681 is about 542.6579983922.

The spelling of 159800681 in words is "one hundred fifty-nine million, eight hundred thousand, six hundred eighty-one".