170389 has 2 divisors, whose sum is σ = 170390. Its totient is φ = 170388.

The previous prime is 170383. The next prime is 170393. The reversal of 170389 is 983071.

170389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136900 + 33489 = 370^2 + 183^2 .

It is a cyclic number.

It is not a de Polignac number, because 170389 - 2¹⁷ = 39317 is a prime.

It is a super-2 number, since 2×170389² = 58064822642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85194 + 85195.

It is an arithmetic number, because the mean of its divisors is an integer number (85195).

2¹⁷⁰³⁸⁹ is an apocalyptic number.

It is an amenable number.

170389 is a deficient number, since it is larger than the sum of its proper divisors (1).

170389 is an equidigital number, since it uses as much as digits as its factorization.

170389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 170389 is about 412.7820248024. The cubic root of 170389 is about 55.4388038516.

The spelling of 170389 in words is "one hundred seventy thousand, three hundred eighty-nine".