170159989 has 4 divisors (see below), whose sum is σ = 170616556. Its totient is φ = 169703424.

The previous prime is 170159981. The next prime is 170159993. The reversal of 170159989 is 989951071.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30140100 + 140019889 = 5490^2 + 11833^2 .

It is a cyclic number.

It is not a de Polignac number, because 170159989 - 2³ = 170159981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170159981) 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, 227724 + ... + 228469.

It is an arithmetic number, because the mean of its divisors is an integer number (42654139).

Almost surely, 2^170159989 is an apocalyptic number.

It is an amenable number.

170159989 is a deficient number, since it is larger than the sum of its proper divisors (456567).

170159989 is an equidigital number, since it uses as much as digits as its factorization.

170159989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456566.

The product of its (nonzero) digits is 204120, while the sum is 49.

The square root of 170159989 is about 13044.5386656639. The cubic root of 170159989 is about 554.1395524400.

The spelling of 170159989 in words is "one hundred seventy million, one hundred fifty-nine thousand, nine hundred eighty-nine".