159846989 has 4 divisors (see below), whose sum is σ = 162556320. Its totient is φ = 157137660.

The previous prime is 159846977. The next prime is 159846997. The reversal of 159846989 is 989648951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989648951 = 15761 ⋅62791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159846989 is a prime.

It is a super-2 number, since 2×159846989² = 51102119784732242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59), and also a Moran number because the ratio is a prime number: 2709271 = 159846989 / (1 + 5 + 9 + 8 + 4 + 6 + 9 + 8 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159846689) 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, 1354577 + ... + 1354694.

It is an arithmetic number, because the mean of its divisors is an integer number (40639080).

Almost surely, 2^159846989 is an apocalyptic number.

It is an amenable number.

159846989 is a deficient number, since it is larger than the sum of its proper divisors (2709331).

159846989 is an equidigital number, since it uses as much as digits as its factorization.

159846989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709330.

The product of its digits is 5598720, while the sum is 59.

The square root of 159846989 is about 12643.0609031199. The cubic root of 159846989 is about 542.7104115598.

The spelling of 159846989 in words is "one hundred fifty-nine million, eight hundred forty-six thousand, nine hundred eighty-nine".