264320005 has 4 divisors (see below), whose sum is σ = 317184012. Its totient is φ = 211456000.

The previous prime is 264320003. The next prime is 264320027. The reversal of 264320005 is 500023462.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57017601 + 207302404 = 7551^2 + 14398^2 .

It is not a de Polignac number, because 264320005 - 2¹ = 264320003 is a prime.

It is a super-4 number, since 4×264320005⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264320003) 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, 26431996 + ... + 26432005.

It is an arithmetic number, because the mean of its divisors is an integer number (79296003).

Almost surely, 2^264320005 is an apocalyptic number.

It is an amenable number.

264320005 is a deficient number, since it is larger than the sum of its proper divisors (52864007).

264320005 is an equidigital number, since it uses as much as digits as its factorization.

264320005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52864006.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 264320005 is about 16257.9213000925. The cubic root of 264320005 is about 641.7659600845.

Adding to 264320005 its reverse (500023462), we get a palindrome (764343467).

The spelling of 264320005 in words is "two hundred sixty-four million, three hundred twenty thousand, five".