159475681 has 2 divisors, whose sum is σ = 159475682. Its totient is φ = 159475680.

The previous prime is 159475651. The next prime is 159475709. The reversal of 159475681 is 186574951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97318225 + 62157456 = 9865^2 + 7884^2 .

It is a cyclic number.

It is not a de Polignac number, because 159475681 - 2¹³ = 159467489 is a prime.

It is a super-2 number, since 2×159475681² = 50864985660827522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (159475651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79737840 + 79737841.

It is an arithmetic number, because the mean of its divisors is an integer number (79737841).

Almost surely, 2^159475681 is an apocalyptic number.

It is an amenable number.

159475681 is a deficient number, since it is larger than the sum of its proper divisors (1).

159475681 is an equidigital number, since it uses as much as digits as its factorization.

159475681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 46.

The square root of 159475681 is about 12628.3681051829. The cubic root of 159475681 is about 542.2898657376.

The spelling of 159475681 in words is "one hundred fifty-nine million, four hundred seventy-five thousand, six hundred eighty-one".