264336509 has 2 divisors, whose sum is σ = 264336510. Its totient is φ = 264336508.

The previous prime is 264336487. The next prime is 264336533. The reversal of 264336509 is 905633462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241802500 + 22534009 = 15550^2 + 4747^2 .

It is a cyclic number.

It is not a de Polignac number, because 264336509 - 2⁸ = 264336253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264336559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132168254 + 132168255.

It is an arithmetic number, because the mean of its divisors is an integer number (132168255).

Almost surely, 2^264336509 is an apocalyptic number.

It is an amenable number.

264336509 is a deficient number, since it is larger than the sum of its proper divisors (1).

264336509 is an equidigital number, since it uses as much as digits as its factorization.

264336509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 264336509 is about 16258.4288601328. The cubic root of 264336509 is about 641.7793169811.

The spelling of 264336509 in words is "two hundred sixty-four million, three hundred thirty-six thousand, five hundred nine".