188397 has 18 divisors (see below), whose sum is σ = 300846. Its totient is φ = 113520.

The previous prime is 188389. The next prime is 188401. The reversal of 188397 is 793881.

188397 is nontrivially palindromic in base 2 and base 8.

It can be written as a sum of positive squares in only one way, i.e., 184041 + 4356 = 429^2 + 66^2 .

It is not a de Polignac number, because 188397 - 2³ = 188389 is a prime.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188317) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1003 + ... + 1175.

2¹⁸⁸³⁹⁷ is an apocalyptic number.

It is an amenable number.

188397 is a deficient number, since it is larger than the sum of its proper divisors (112449).

188397 is a wasteful number, since it uses less digits than its factorization.

188397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 187 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 188397 is about 434.0472324529. The cubic root of 188397 is about 57.3268388473.

It can be divided in two parts, 188 and 397, that added together give a palindrome (585).

The spelling of 188397 in words is "one hundred eighty-eight thousand, three hundred ninety-seven".