159055993 has 4 divisors (see below), whose sum is σ = 161069440. Its totient is φ = 157042548.

The previous prime is 159055979. The next prime is 159056003. The reversal of 159055993 is 399550951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399550951 = 29 ⋅13777619.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159055993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159055913) 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, 1006605 + ... + 1006762.

It is an arithmetic number, because the mean of its divisors is an integer number (40267360).

Almost surely, 2^159055993 is an apocalyptic number.

It is an amenable number.

159055993 is a deficient number, since it is larger than the sum of its proper divisors (2013447).

159055993 is an equidigital number, since it uses as much as digits as its factorization.

159055993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013446.

The product of its (nonzero) digits is 273375, while the sum is 46.

The square root of 159055993 is about 12611.7402843541. The cubic root of 159055993 is about 541.8137377789.

The spelling of 159055993 in words is "one hundred fifty-nine million, fifty-five thousand, nine hundred ninety-three".