159858691 has 4 divisors (see below), whose sum is σ = 159985152. Its totient is φ = 159732232.

The previous prime is 159858689. The next prime is 159858707. The reversal of 159858691 is 196858951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196858951 = 643 ⋅306157.

It is a cyclic number.

It is not a de Polignac number, because 159858691 - 2¹ = 159858689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159858641) 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, 61315 + ... + 63868.

It is an arithmetic number, because the mean of its divisors is an integer number (39996288).

Almost surely, 2^159858691 is an apocalyptic number.

159858691 is a deficient number, since it is larger than the sum of its proper divisors (126461).

159858691 is a wasteful number, since it uses less digits than its factorization.

159858691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126460.

The product of its digits is 777600, while the sum is 52.

The square root of 159858691 is about 12643.5236781524. The cubic root of 159858691 is about 542.7236547292.

The spelling of 159858691 in words is "one hundred fifty-nine million, eight hundred fifty-eight thousand, six hundred ninety-one".