264521189 has 2 divisors, whose sum is σ = 264521190. Its totient is φ = 264521188.

The previous prime is 264521149. The next prime is 264521237. The reversal of 264521189 is 981125462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203290564 + 61230625 = 14258^2 + 7825^2 .

It is a cyclic number.

It is not a de Polignac number, because 264521189 - 2²⁴ = 247743973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264521129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132260594 + 132260595.

It is an arithmetic number, because the mean of its divisors is an integer number (132260595).

Almost surely, 2^264521189 is an apocalyptic number.

It is an amenable number.

264521189 is a deficient number, since it is larger than the sum of its proper divisors (1).

264521189 is an equidigital number, since it uses as much as digits as its factorization.

264521189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 264521189 is about 16264.1073840528. The cubic root of 264521189 is about 641.9287429445.

The spelling of 264521189 in words is "two hundred sixty-four million, five hundred twenty-one thousand, one hundred eighty-nine".