264653 has 4 divisors (see below), whose sum is σ = 265728. Its totient is φ = 263580.

The previous prime is 264643. The next prime is 264659. The reversal of 264653 is 356462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 356462 = 2 ⋅178231.

It is a cyclic number.

It is not a de Polignac number, because 264653 - 2⁴ = 264637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38 + ... + 728.

It is an arithmetic number, because the mean of its divisors is an integer number (66432).

2²⁶⁴⁶⁵³ is an apocalyptic number.

It is an amenable number.

264653 is a deficient number, since it is larger than the sum of its proper divisors (1075).

264653 is an equidigital number, since it uses as much as digits as its factorization.

264653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074.

The product of its digits is 4320, while the sum is 26.

The square root of 264653 is about 514.4443604512. Note that the first 3 decimals coincide. The cubic root of 264653 is about 64.2035349677.

Subtracting 264653 from its reverse (356462), we obtain a square (91809 = 303²).

The spelling of 264653 in words is "two hundred sixty-four thousand, six hundred fifty-three".