159097681 has 2 divisors, whose sum is σ = 159097682. Its totient is φ = 159097680.

The previous prime is 159097663. The next prime is 159097711. The reversal of 159097681 is 186790951.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124523281 + 34574400 = 11159^2 + 5880^2 .

It is a cyclic number.

It is not a de Polignac number, because 159097681 - 2⁷ = 159097553 is a prime.

It is a super-2 number, since 2×159097681² = 50624144199155522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (159097651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79548840 + 79548841.

It is an arithmetic number, because the mean of its divisors is an integer number (79548841).

Almost surely, 2^159097681 is an apocalyptic number.

It is an amenable number.

159097681 is a deficient number, since it is larger than the sum of its proper divisors (1).

159097681 is an equidigital number, since it uses as much as digits as its factorization.

159097681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 159097681 is about 12613.3929218113. The cubic root of 159097681 is about 541.8610694504.

The spelling of 159097681 in words is "one hundred fifty-nine million, ninety-seven thousand, six hundred eighty-one".