159688394 has 8 divisors (see below), whose sum is σ = 239592900. Its totient is φ = 79824096.

The previous prime is 159688391. The next prime is 159688427. The reversal of 159688394 is 493886951.

It can be written as a sum of positive squares in 2 ways, for example, as 159087769 + 600625 = 12613^2 + 775^2 .

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

It is not an unprimeable number, because it can be changed into a prime (159688391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3572 + ... + 18224.

Almost surely, 2^159688394 is an apocalyptic number.

159688394 is a deficient number, since it is larger than the sum of its proper divisors (79904506).

159688394 is a wasteful number, since it uses less digits than its factorization.

159688394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20104.

The product of its digits is 1866240, while the sum is 53.

The square root of 159688394 is about 12636.7873290643. The cubic root of 159688394 is about 542.5308656085.

The spelling of 159688394 in words is "one hundred fifty-nine million, six hundred eighty-eight thousand, three hundred ninety-four".