23140189 has 4 divisors (see below), whose sum is σ = 23149980. Its totient is φ = 23130400.

The previous prime is 23140177. The next prime is 23140199. The reversal of 23140189 is 98104132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 18344089 + 4796100 = 4283^2 + 2190^2 .

It is a cyclic number.

It is not a de Polignac number, because 23140189 - 2²¹ = 21043037 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 (23140109) 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 3 ways as a sum of consecutive naturals, for example, 1089 + ... + 6889.

It is an arithmetic number, because the mean of its divisors is an integer number (5787495).

Almost surely, 2^23140189 is an apocalyptic number.

It is an amenable number.

23140189 is a deficient number, since it is larger than the sum of its proper divisors (9791).

23140189 is an equidigital number, since it uses as much as digits as its factorization.

23140189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9790.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 23140189 is about 4810.4250331961. The cubic root of 23140189 is about 284.9633234839.

The spelling of 23140189 in words is "twenty-three million, one hundred forty thousand, one hundred eighty-nine".