520071613 has 2 divisors, whose sum is σ = 520071614. Its totient is φ = 520071612.

The previous prime is 520071571. The next prime is 520071623. The reversal of 520071613 is 316170025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280998169 + 239073444 = 16763^2 + 15462^2 .

It is a cyclic number.

It is not a de Polignac number, because 520071613 - 2¹⁷ = 519940541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520071623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260035806 + 260035807.

It is an arithmetic number, because the mean of its divisors is an integer number (260035807).

Almost surely, 2^520071613 is an apocalyptic number.

It is an amenable number.

520071613 is a deficient number, since it is larger than the sum of its proper divisors (1).

520071613 is an equidigital number, since it uses as much as digits as its factorization.

520071613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 520071613 is about 22805.0786668233. The cubic root of 520071613 is about 804.1820649251.

The spelling of 520071613 in words is "five hundred twenty million, seventy-one thousand, six hundred thirteen".