188129 has 4 divisors (see below), whose sum is σ = 189360. Its totient is φ = 186900.

The previous prime is 188107. The next prime is 188137. The reversal of 188129 is 921881.

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-188129 is a prime.

It is a super-4 number, since 4×188129⁴ (a number of 22 digits) contains 4444 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347 + ... + 704.

It is an arithmetic number, because the mean of its divisors is an integer number (47340).

2¹⁸⁸¹²⁹ is an apocalyptic number.

It is an amenable number.

188129 is a deficient number, since it is larger than the sum of its proper divisors (1231).

188129 is a wasteful number, since it uses less digits than its factorization.

188129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230.

The product of its digits is 1152, while the sum is 29.

The square root of 188129 is about 433.7384004213. The cubic root of 188129 is about 57.2996429372.

The spelling of 188129 in words is "one hundred eighty-eight thousand, one hundred twenty-nine".