159163391 has 4 divisors (see below), whose sum is σ = 161539032. Its totient is φ = 156787752.

The previous prime is 159163387. The next prime is 159163409. The reversal of 159163391 is 193361951.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 159163391 - 2² = 159163387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159163321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187720 + ... + 1187853.

It is an arithmetic number, because the mean of its divisors is an integer number (40384758).

Almost surely, 2^159163391 is an apocalyptic number.

159163391 is a deficient number, since it is larger than the sum of its proper divisors (2375641).

159163391 is an equidigital number, since it uses as much as digits as its factorization.

159163391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375640.

The product of its digits is 21870, while the sum is 38.

The square root of 159163391 is about 12615.9974239059. The cubic root of 159163391 is about 541.9356584071.

The spelling of 159163391 in words is "one hundred fifty-nine million, one hundred sixty-three thousand, three hundred ninety-one".