398173 has 4 divisors (see below), whose sum is σ = 399520. Its totient is φ = 396828.

The previous prime is 398171. The next prime is 398207. The reversal of 398173 is 371893.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 371893 = 383 ⋅971.

It is a cyclic number.

It is not a de Polignac number, because 398173 - 2¹ = 398171 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 (398171) 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, 15 + ... + 892.

It is an arithmetic number, because the mean of its divisors is an integer number (99880).

2³⁹⁸¹⁷³ is an apocalyptic number.

It is an amenable number.

398173 is a deficient number, since it is larger than the sum of its proper divisors (1347).

398173 is an equidigital number, since it uses as much as digits as its factorization.

398173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346.

The product of its digits is 4536, while the sum is 31.

The square root of 398173 is about 631.0095086447. The cubic root of 398173 is about 73.5682799868.

The spelling of 398173 in words is "three hundred ninety-eight thousand, one hundred seventy-three".