523438834309 has 2 divisors, whose sum is σ = 523438834310. Its totient is φ = 523438834308.

The previous prime is 523438834307. The next prime is 523438834319. The reversal of 523438834309 is 903438834325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435200131809 + 88238702500 = 659697^2 + 297050^2 .

It is a cyclic number.

It is not a de Polignac number, because 523438834309 - 2¹ = 523438834307 is a prime.

Together with 523438834307, 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 (523438834307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261719417154 + 261719417155.

It is an arithmetic number, because the mean of its divisors is an integer number (261719417155).

Almost surely, 2^523438834309 is an apocalyptic number.

It is an amenable number.

523438834309 is a deficient number, since it is larger than the sum of its proper divisors (1).

523438834309 is an equidigital number, since it uses as much as digits as its factorization.

523438834309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 523438834309 in words is "five hundred twenty-three billion, four hundred thirty-eight million, eight hundred thirty-four thousand, three hundred nine".