23213189 has 2 divisors, whose sum is σ = 23213190. Its totient is φ = 23213188.

The previous prime is 23213173. The next prime is 23213209. The reversal of 23213189 is 98131232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11937025 + 11276164 = 3455^2 + 3358^2 .

It is a cyclic number.

It is not a de Polignac number, because 23213189 - 2⁴ = 23213173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23213149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606594 + 11606595.

It is an arithmetic number, because the mean of its divisors is an integer number (11606595).

Almost surely, 2^23213189 is an apocalyptic number.

It is an amenable number.

23213189 is a deficient number, since it is larger than the sum of its proper divisors (1).

23213189 is an equidigital number, since it uses as much as digits as its factorization.

23213189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 23213189 is about 4818.0067455328. The cubic root of 23213189 is about 285.2626654058.

The spelling of 23213189 in words is "twenty-three million, two hundred thirteen thousand, one hundred eighty-nine".