564763813 has 4 divisors (see below), whose sum is σ = 575419788. Its totient is φ = 554107840.

The previous prime is 564763769. The next prime is 564763841. The reversal of 564763813 is 318367465.

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 257217444 + 307546369 = 16038^2 + 17537^2 .

It is a cyclic number.

It is not a de Polignac number, because 564763813 - 2¹³ = 564755621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 564763813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564763883) 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, 5327908 + ... + 5328013.

It is an arithmetic number, because the mean of its divisors is an integer number (143854947).

Almost surely, 2^564763813 is an apocalyptic number.

564763813 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

564763813 is a deficient number, since it is larger than the sum of its proper divisors (10655975).

564763813 is a wasteful number, since it uses less digits than its factorization.

564763813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655974.

The product of its digits is 362880, while the sum is 43.

The square root of 564763813 is about 23764.7598977983. The cubic root of 564763813 is about 826.5877293216.

The spelling of 564763813 in words is "five hundred sixty-four million, seven hundred sixty-three thousand, eight hundred thirteen".