159929881 has 2 divisors, whose sum is σ = 159929882. Its totient is φ = 159929880.

The previous prime is 159929831. The next prime is 159929893. The reversal of 159929881 is 188929951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159896025 + 33856 = 12645^2 + 184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159929881 is a prime.

It is a super-2 number, since 2×159929881² = 51155133673348322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (159929831) 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, 79964940 + 79964941.

It is an arithmetic number, because the mean of its divisors is an integer number (79964941).

Almost surely, 2^159929881 is an apocalyptic number.

It is an amenable number.

159929881 is a deficient number, since it is larger than the sum of its proper divisors (1).

159929881 is an equidigital number, since it uses as much as digits as its factorization.

159929881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 52.

The square root of 159929881 is about 12646.3386400966. The cubic root of 159929881 is about 542.8042066275.

The spelling of 159929881 in words is "one hundred fifty-nine million, nine hundred twenty-nine thousand, eight hundred eighty-one".