188763121 has 8 divisors (see below), whose sum is σ = 201328200. Its totient is φ = 176360448.

The previous prime is 188763109. The next prime is 188763143. The reversal of 188763121 is 121367881.

It can be written as a sum of positive squares in 4 ways, for example, as 23280625 + 165482496 = 4825^2 + 12864^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 188763121 - 2⁵ = 188763089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188763151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38196 + ... + 42853.

It is an arithmetic number, because the mean of its divisors is an integer number (25166025).

Almost surely, 2^188763121 is an apocalyptic number.

It is an amenable number.

188763121 is a deficient number, since it is larger than the sum of its proper divisors (12565079).

188763121 is a wasteful number, since it uses less digits than its factorization.

188763121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81203.

The product of its digits is 16128, while the sum is 37.

The square root of 188763121 is about 13739.1091778179. The cubic root of 188763121 is about 573.6395015694.

The spelling of 188763121 in words is "one hundred eighty-eight million, seven hundred sixty-three thousand, one hundred twenty-one".