159988517 has 8 divisors (see below), whose sum is σ = 175961856. Its totient is φ = 144538992.

The previous prime is 159988511. The next prime is 159988537. The reversal of 159988517 is 715889951.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 159988517 - 2¹² = 159984421 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 (159988511) 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 7 ways as a sum of consecutive naturals, for example, 130313 + ... + 131534.

It is an arithmetic number, because the mean of its divisors is an integer number (21995232).

Almost surely, 2^159988517 is an apocalyptic number.

It is an amenable number.

159988517 is a deficient number, since it is larger than the sum of its proper divisors (15973339).

159988517 is a wasteful number, since it uses less digits than its factorization.

159988517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261907.

The product of its digits is 907200, while the sum is 53.

The square root of 159988517 is about 12648.6567270995. The cubic root of 159988517 is about 542.8705356510.

The spelling of 159988517 in words is "one hundred fifty-nine million, nine hundred eighty-eight thousand, five hundred seventeen".