159658 has 4 divisors (see below), whose sum is σ = 239490. Its totient is φ = 79828.

The previous prime is 159631. The next prime is 159667. The reversal of 159658 is 856951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 856951 = 47 ⋅18233.

It can be written as a sum of positive squares in only one way, i.e., 131769 + 27889 = 363^2 + 167^2 .

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39913 + ... + 39916.

2¹⁵⁹⁶⁵⁸ is an apocalyptic number.

159658 is a deficient number, since it is larger than the sum of its proper divisors (79832).

159658 is an equidigital number, since it uses as much as digits as its factorization.

159658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79831.

The product of its digits is 10800, while the sum is 34.

The square root of 159658 is about 399.5722713102. The cubic root of 159658 is about 54.2496442883.

The spelling of 159658 in words is "one hundred fifty-nine thousand, six hundred fifty-eight".