188813 has 4 divisors (see below), whose sum is σ = 193248. Its totient is φ = 184380.

The previous prime is 188801. The next prime is 188827. The reversal of 188813 is 318881.

It is a happy number.

188813 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188813 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 (188833) 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, 2153 + ... + 2238.

It is an arithmetic number, because the mean of its divisors is an integer number (48312).

2¹⁸⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

188813 is a deficient number, since it is larger than the sum of its proper divisors (4435).

188813 is an equidigital number, since it uses as much as digits as its factorization.

188813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434.

The product of its digits is 1536, while the sum is 29.

The square root of 188813 is about 434.5261787280. The cubic root of 188813 is about 57.3690023523.

It can be divided in two parts, 188 and 813, that added together give a palindrome (1001).

The spelling of 188813 in words is "one hundred eighty-eight thousand, eight hundred thirteen".