23121193 has 2 divisors, whose sum is σ = 23121194. Its totient is φ = 23121192.

The previous prime is 23121191. The next prime is 23121209. The reversal of 23121193 is 39112132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22924944 + 196249 = 4788^2 + 443^2 .

It is a cyclic number.

It is not a de Polignac number, because 23121193 - 2¹ = 23121191 is a prime.

Together with 23121191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23121191) 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 as a sum of consecutive naturals, namely, 11560596 + 11560597.

It is an arithmetic number, because the mean of its divisors is an integer number (11560597).

Almost surely, 2^23121193 is an apocalyptic number.

It is an amenable number.

23121193 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121193 is an equidigital number, since it uses as much as digits as its factorization.

23121193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 22.

The square root of 23121193 is about 4808.4501661138. The cubic root of 23121193 is about 284.8853257745.

The spelling of 23121193 in words is "twenty-three million, one hundred twenty-one thousand, one hundred ninety-three".