170887089 has 4 divisors (see below), whose sum is σ = 227849456. Its totient is φ = 113924724.

The previous prime is 170887061. The next prime is 170887091. The reversal of 170887089 is 980788071.

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: 980788071 = 3 ⋅326929357.

It is not a de Polignac number, because 170887089 - 2²¹ = 168789937 is a prime.

It is a super-3 number, since 3×170887089³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170887019) 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, 28481179 + ... + 28481184.

It is an arithmetic number, because the mean of its divisors is an integer number (56962364).

Almost surely, 2^170887089 is an apocalyptic number.

It is an amenable number.

170887089 is a deficient number, since it is larger than the sum of its proper divisors (56962367).

170887089 is an equidigital number, since it uses as much as digits as its factorization.

170887089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56962366.

The product of its (nonzero) digits is 225792, while the sum is 48.

The square root of 170887089 is about 13072.3788577290. The cubic root of 170887089 is about 554.9277172319.

The spelling of 170887089 in words is "one hundred seventy million, eight hundred eighty-seven thousand, eighty-nine".