520034309 has 2 divisors, whose sum is σ = 520034310. Its totient is φ = 520034308.

The previous prime is 520034257. The next prime is 520034311. The reversal of 520034309 is 903430025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464531809 + 55502500 = 21553^2 + 7450^2 .

It is a cyclic number.

It is not a de Polignac number, because 520034309 - 2¹⁶ = 519968773 is a prime.

Together with 520034311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520034399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260017154 + 260017155.

It is an arithmetic number, because the mean of its divisors is an integer number (260017155).

Almost surely, 2^520034309 is an apocalyptic number.

It is an amenable number.

520034309 is a deficient number, since it is larger than the sum of its proper divisors (1).

520034309 is an equidigital number, since it uses as much as digits as its factorization.

520034309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 520034309 is about 22804.2607641642. The cubic root of 520034309 is about 804.1628368520.

The spelling of 520034309 in words is "five hundred twenty million, thirty-four thousand, three hundred nine".