159371986 has 4 divisors (see below), whose sum is σ = 239057982. Its totient is φ = 79685992.

The previous prime is 159371983. The next prime is 159371999. The reversal of 159371986 is 689173951.

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

It can be written as a sum of positive squares in only one way, i.e., 150185025 + 9186961 = 12255^2 + 3031^2 .

It is not an unprimeable number, because it can be changed into a prime (159371983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39842995 + ... + 39842998.

Almost surely, 2^159371986 is an apocalyptic number.

159371986 is a deficient number, since it is larger than the sum of its proper divisors (79685996).

159371986 is an equidigital number, since it uses as much as digits as its factorization.

159371986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79685995.

The product of its digits is 408240, while the sum is 49.

The square root of 159371986 is about 12624.2618002004. The cubic root of 159371986 is about 542.1723035287.

The spelling of 159371986 in words is "one hundred fifty-nine million, three hundred seventy-one thousand, nine hundred eighty-six".