264543361 has 2 divisors, whose sum is σ = 264543362. Its totient is φ = 264543360.

The previous prime is 264543359. The next prime is 264543371. The reversal of 264543361 is 163345462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259049025 + 5494336 = 16095^2 + 2344^2 .

It is a cyclic number.

It is not a de Polignac number, because 264543361 - 2¹ = 264543359 is a prime.

Together with 264543359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (264543371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132271680 + 132271681.

It is an arithmetic number, because the mean of its divisors is an integer number (132271681).

Almost surely, 2^264543361 is an apocalyptic number.

It is an amenable number.

264543361 is a deficient number, since it is larger than the sum of its proper divisors (1).

264543361 is an equidigital number, since it uses as much as digits as its factorization.

264543361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 34.

The square root of 264543361 is about 16264.7889934054. The cubic root of 264543361 is about 641.9466777982.

The spelling of 264543361 in words is "two hundred sixty-four million, five hundred forty-three thousand, three hundred sixty-one".