159938081 has 2 divisors, whose sum is σ = 159938082. Its totient is φ = 159938080.

The previous prime is 159938063. The next prime is 159938099. The reversal of 159938081 is 180839951.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (159938063) and next prime (159938099).

It can be written as a sum of positive squares in only one way, i.e., 146797456 + 13140625 = 12116^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 159938081 - 2⁶ = 159938017 is a prime.

It is a super-2 number, since 2×159938081² = 51160379507925122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (159938011) 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, 79969040 + 79969041.

It is an arithmetic number, because the mean of its divisors is an integer number (79969041).

Almost surely, 2^159938081 is an apocalyptic number.

It is an amenable number.

159938081 is a deficient number, since it is larger than the sum of its proper divisors (1).

159938081 is an equidigital number, since it uses as much as digits as its factorization.

159938081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 159938081 is about 12646.6628404493. The cubic root of 159938081 is about 542.8134834397.

The spelling of 159938081 in words is "one hundred fifty-nine million, nine hundred thirty-eight thousand, eighty-one".