264643 has 2 divisors, whose sum is σ = 264644. Its totient is φ = 264642.

The previous prime is 264637. The next prime is 264659. The reversal of 264643 is 346462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264643 - 2¹⁷ = 133571 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 6³ + 6³ + 4² + 4⁹ + 3 .

It is not a weakly prime, because it can be changed into another prime (264343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132321 + 132322.

It is an arithmetic number, because the mean of its divisors is an integer number (132322).

2²⁶⁴⁶⁴³ is an apocalyptic number.

264643 is a deficient number, since it is larger than the sum of its proper divisors (1).

264643 is an equidigital number, since it uses as much as digits as its factorization.

264643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 25.

The square root of 264643 is about 514.4346411353. The cubic root of 264643 is about 64.2027263070.

It can be divided in two parts, 2 and 64643, that multiplied together give a triangular number (129286 = T₅₀₈).

The spelling of 264643 in words is "two hundred sixty-four thousand, six hundred forty-three".