264809653 has 2 divisors, whose sum is σ = 264809654. Its totient is φ = 264809652.

The previous prime is 264809651. The next prime is 264809681. The reversal of 264809653 is 356908462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263153284 + 1656369 = 16222^2 + 1287^2 .

It is a cyclic number.

It is not a de Polignac number, because 264809653 - 2¹ = 264809651 is a prime.

Together with 264809651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264809651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132404826 + 132404827.

It is an arithmetic number, because the mean of its divisors is an integer number (132404827).

Almost surely, 2^264809653 is an apocalyptic number.

It is an amenable number.

264809653 is a deficient number, since it is larger than the sum of its proper divisors (1).

264809653 is an equidigital number, since it uses as much as digits as its factorization.

264809653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 264809653 is about 16272.9730842277. The cubic root of 264809653 is about 642.1620022195.

The spelling of 264809653 in words is "two hundred sixty-four million, eight hundred nine thousand, six hundred fifty-three".