159938243 has 4 divisors (see below), whose sum is σ = 160775808. Its totient is φ = 159100680.

The previous prime is 159938237. The next prime is 159938263. The reversal of 159938243 is 342839951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342839951 = 281 ⋅1220071.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159938243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 159938194 and 159938203.

It is not an unprimeable number, because it can be changed into a prime (159938213) 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 in 3 ways as a sum of consecutive naturals, for example, 418496 + ... + 418877.

It is an arithmetic number, because the mean of its divisors is an integer number (40193952).

Almost surely, 2^159938243 is an apocalyptic number.

159938243 is a deficient number, since it is larger than the sum of its proper divisors (837565).

159938243 is an equidigital number, since it uses as much as digits as its factorization.

159938243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837564.

The product of its digits is 233280, while the sum is 44.

The square root of 159938243 is about 12646.6692452993. The cubic root of 159938243 is about 542.8136667101.

The spelling of 159938243 in words is "one hundred fifty-nine million, nine hundred thirty-eight thousand, two hundred forty-three".