530726389 has 2 divisors, whose sum is σ = 530726390. Its totient is φ = 530726388.

The previous prime is 530726387. The next prime is 530726447. The reversal of 530726389 is 983627035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440286289 + 90440100 = 20983^2 + 9510^2 .

It is a cyclic number.

It is not a de Polignac number, because 530726389 - 2¹ = 530726387 is a prime.

Together with 530726387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (530726381) 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 as a sum of consecutive naturals, namely, 265363194 + 265363195.

It is an arithmetic number, because the mean of its divisors is an integer number (265363195).

Almost surely, 2^530726389 is an apocalyptic number.

It is an amenable number.

530726389 is a deficient number, since it is larger than the sum of its proper divisors (1).

530726389 is an equidigital number, since it uses as much as digits as its factorization.

530726389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 530726389 is about 23037.4996256104. The cubic root of 530726389 is about 809.6367771457.

The spelling of 530726389 in words is "five hundred thirty million, seven hundred twenty-six thousand, three hundred eighty-nine".