23162189 has 2 divisors, whose sum is σ = 23162190. Its totient is φ = 23162188.

The previous prime is 23162107. The next prime is 23162203. The reversal of 23162189 is 98126132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22944100 + 218089 = 4790^2 + 467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23162189 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23164189) 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 as a sum of consecutive naturals, namely, 11581094 + 11581095.

It is an arithmetic number, because the mean of its divisors is an integer number (11581095).

Almost surely, 2^23162189 is an apocalyptic number.

It is an amenable number.

23162189 is a deficient number, since it is larger than the sum of its proper divisors (1).

23162189 is an equidigital number, since it uses as much as digits as its factorization.

23162189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 23162189 is about 4812.7111901713. The cubic root of 23162189 is about 285.0536023115.

The spelling of 23162189 in words is "twenty-three million, one hundred sixty-two thousand, one hundred eighty-nine".