159908391 has 8 divisors (see below), whose sum is σ = 236901360. Its totient is φ = 106605576.

The previous prime is 159908387. The next prime is 159908393. The reversal of 159908391 is 193809951.

It is not a de Polignac number, because 159908391 - 2² = 159908387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159908393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2961240 + ... + 2961293.

It is an arithmetic number, because the mean of its divisors is an integer number (29612670).

Almost surely, 2^159908391 is an apocalyptic number.

159908391 is a deficient number, since it is larger than the sum of its proper divisors (76992969).

159908391 is an equidigital number, since it uses as much as digits as its factorization.

159908391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5922542 (or 5922536 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 159908391 is about 12645.4889585180. The cubic root of 159908391 is about 542.7798930870.

The spelling of 159908391 in words is "one hundred fifty-nine million, nine hundred eight thousand, three hundred ninety-one".