264605189 has 2 divisors, whose sum is σ = 264605190. Its totient is φ = 264605188.

The previous prime is 264605171. The next prime is 264605219. The reversal of 264605189 is 981506462.

It is a happy number.

264605189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175774564 + 88830625 = 13258^2 + 9425^2 .

It is a cyclic number.

It is not a de Polignac number, because 264605189 - 2²⁰ = 263556613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264605489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132302594 + 132302595.

It is an arithmetic number, because the mean of its divisors is an integer number (132302595).

Almost surely, 2^264605189 is an apocalyptic number.

It is an amenable number.

264605189 is a deficient number, since it is larger than the sum of its proper divisors (1).

264605189 is an equidigital number, since it uses as much as digits as its factorization.

264605189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 264605189 is about 16266.6895525795. The cubic root of 264605189 is about 641.9966849594.

The spelling of 264605189 in words is "two hundred sixty-four million, six hundred five thousand, one hundred eighty-nine".