264393813 has 8 divisors (see below), whose sum is σ = 356486400. Its totient is φ = 174281888.

The previous prime is 264393791. The next prime is 264393821. The reversal of 264393813 is 318393462.

264393813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264393813 - 2⁵ = 264393781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264393313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494853 + ... + 495386.

It is an arithmetic number, because the mean of its divisors is an integer number (44560800).

Almost surely, 2^264393813 is an apocalyptic number.

It is an amenable number.

264393813 is a deficient number, since it is larger than the sum of its proper divisors (92092587).

264393813 is an equidigital number, since it uses as much as digits as its factorization.

264393813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990331.

The product of its digits is 93312, while the sum is 39.

The square root of 264393813 is about 16260.1910505381. The cubic root of 264393813 is about 641.8256895196.

The spelling of 264393813 in words is "two hundred sixty-four million, three hundred ninety-three thousand, eight hundred thirteen".