264009523 has 2 divisors, whose sum is σ = 264009524. Its totient is φ = 264009522.

The previous prime is 264009517. The next prime is 264009569. The reversal of 264009523 is 325900462.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264009523 is a prime.

It is equal to p_14402695 and since 264009523 and 14402695 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (264009223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132004761 + 132004762.

It is an arithmetic number, because the mean of its divisors is an integer number (132004762).

Almost surely, 2^264009523 is an apocalyptic number.

264009523 is a deficient number, since it is larger than the sum of its proper divisors (1).

264009523 is an equidigital number, since it uses as much as digits as its factorization.

264009523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 264009523 is about 16248.3698566964. The cubic root of 264009523 is about 641.5145793785.

Adding to 264009523 its reverse (325900462), we get a palindrome (589909985).

The spelling of 264009523 in words is "two hundred sixty-four million, nine thousand, five hundred twenty-three".