189144121 has 8 divisors (see below), whose sum is σ = 196815744. Its totient is φ = 181624560.

The previous prime is 189144101. The next prime is 189144133. The reversal of 189144121 is 121441981.

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

It is a cyclic number.

It is not a de Polignac number, because 189144121 - 2⁵ = 189144089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189144101) 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, 35475 + ... + 40456.

It is an arithmetic number, because the mean of its divisors is an integer number (24601968).

Almost surely, 2^189144121 is an apocalyptic number.

It is an amenable number.

189144121 is a deficient number, since it is larger than the sum of its proper divisors (7671623).

189144121 is an equidigital number, since it uses as much as digits as its factorization.

189144121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76031.

The product of its digits is 2304, while the sum is 31.

The square root of 189144121 is about 13752.9677160968. The cubic root of 189144121 is about 574.0251873759.

The spelling of 189144121 in words is "one hundred eighty-nine million, one hundred forty-four thousand, one hundred twenty-one".