188361 has 6 divisors (see below), whose sum is σ = 272090. Its totient is φ = 125568.

The previous prime is 188359. The next prime is 188369. The reversal of 188361 is 163881.

It can be written as a sum of positive squares in only one way, i.e., 164025 + 24336 = 405^2 + 156^2 .

It is not a de Polignac number, because 188361 - 2¹ = 188359 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 188361.

It is not an unprimeable number, because it can be changed into a prime (188369) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10456 + ... + 10473.

2¹⁸⁸³⁶¹ is an apocalyptic number.

It is an amenable number.

188361 is a deficient number, since it is larger than the sum of its proper divisors (83729).

188361 is a wasteful number, since it uses less digits than its factorization.

188361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20935 (or 20932 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 188361 is about 434.0057603304. The cubic root of 188361 is about 57.3231871656.

The spelling of 188361 in words is "one hundred eighty-eight thousand, three hundred sixty-one".