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168397 = 198863

168397 has 4 divisors (see below), whose sum is σ = 177280. Its totient is φ = 159516.

The previous prime is 168391. The next prime is 168409. The reversal of 168397 is 793861.

It can be divided in two parts, 168 and 397, that added together give a palindrome (565).

168397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 793861 = 6611201.

It is a cyclic number.

It is not a de Polignac number, because 168397 - 27 = 168269 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 (168391) 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, 4413 + ... + 4450.

It is an arithmetic number, because the mean of its divisors is an integer number (44320).

2168397 is an apocalyptic number.

It is an amenable number.

168397 is a deficient number, since it is larger than the sum of its proper divisors (8883).

168397 is an equidigital number, since it uses as much as digits as its factorization.

168397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8882.

The product of its digits is 9072, while the sum is 34.

The square root of 168397 is about 410.3620352810. The cubic root of 168397 is about 55.2219133399.

The spelling of 168397 in words is "one hundred sixty-eight thousand, three hundred ninety-seven".

Divisors: 1 19 8863 168397