159943793 has 2 divisors, whose sum is σ = 159943794. Its totient is φ = 159943792.

The previous prime is 159943781. The next prime is 159943799. The reversal of 159943793 is 397349951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158558464 + 1385329 = 12592^2 + 1177^2 .

It is an emirp because it is prime and its reverse (397349951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159943793 - 2¹² = 159939697 is a prime.

It is not a weakly prime, because it can be changed into another prime (159943799) 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, 79971896 + 79971897.

It is an arithmetic number, because the mean of its divisors is an integer number (79971897).

Almost surely, 2^159943793 is an apocalyptic number.

It is an amenable number.

159943793 is a deficient number, since it is larger than the sum of its proper divisors (1).

159943793 is an equidigital number, since it uses as much as digits as its factorization.

159943793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 50.

The square root of 159943793 is about 12646.8886687596. Note that the first 3 decimals coincide. The cubic root of 159943793 is about 542.8199453440.

The spelling of 159943793 in words is "one hundred fifty-nine million, nine hundred forty-three thousand, seven hundred ninety-three".