530726813 has 4 divisors (see below), whose sum is σ = 530856540. Its totient is φ = 530597088.

The previous prime is 530726783. The next prime is 530726827. The reversal of 530726813 is 318627035.

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 482812729 + 47914084 = 21973^2 + 6922^2 .

It is a cyclic number.

It is not a de Polignac number, because 530726813 - 2¹⁶ = 530661277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530726513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58520 + ... + 66977.

It is an arithmetic number, because the mean of its divisors is an integer number (132714135).

Almost surely, 2^530726813 is an apocalyptic number.

It is an amenable number.

530726813 is a deficient number, since it is larger than the sum of its proper divisors (129727).

530726813 is a wasteful number, since it uses less digits than its factorization.

530726813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129726.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 530726813 is about 23037.5088279961. The cubic root of 530726813 is about 809.6369927533.

The spelling of 530726813 in words is "five hundred thirty million, seven hundred twenty-six thousand, eight hundred thirteen".