170589989 has 2 divisors, whose sum is σ = 170589990. Its totient is φ = 170589988.

The previous prime is 170589967. The next prime is 170590001. The reversal of 170589989 is 989985071.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116273089 + 54316900 = 10783^2 + 7370^2 .

It is an emirp because it is prime and its reverse (989985071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 170589989 - 2¹² = 170585893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170589959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85294994 + 85294995.

It is an arithmetic number, because the mean of its divisors is an integer number (85294995).

Almost surely, 2^170589989 is an apocalyptic number.

It is an amenable number.

170589989 is a deficient number, since it is larger than the sum of its proper divisors (1).

170589989 is an equidigital number, since it uses as much as digits as its factorization.

170589989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 56.

The square root of 170589989 is about 13061.0102595473. The cubic root of 170589989 is about 554.6059362168.

The spelling of 170589989 in words is "one hundred seventy million, five hundred eighty-nine thousand, nine hundred eighty-nine".