170398 has 4 divisors (see below), whose sum is σ = 255600. Its totient is φ = 85198.

The previous prime is 170393. The next prime is 170413. The reversal of 170398 is 893071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 893071 = 673 ⋅1327.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42598 + ... + 42601.

It is an arithmetic number, because the mean of its divisors is an integer number (63900).

2¹⁷⁰³⁹⁸ is an apocalyptic number.

170398 is a deficient number, since it is larger than the sum of its proper divisors (85202).

170398 is an equidigital number, since it uses as much as digits as its factorization.

170398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85201.

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

The square root of 170398 is about 412.7929262960. The cubic root of 170398 is about 55.4397799327.

The spelling of 170398 in words is "one hundred seventy thousand, three hundred ninety-eight".