520726013 has 2 divisors, whose sum is σ = 520726014. Its totient is φ = 520726012.

The previous prime is 520725991. The next prime is 520726033. The reversal of 520726013 is 310627025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430438009 + 90288004 = 20747^2 + 9502^2 .

It is a cyclic number.

It is not a de Polignac number, because 520726013 - 2¹⁰ = 520724989 is a prime.

It is a super-2 number, since 2×520726013² = 542311161229752338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520726033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260363006 + 260363007.

It is an arithmetic number, because the mean of its divisors is an integer number (260363007).

Almost surely, 2^520726013 is an apocalyptic number.

It is an amenable number.

520726013 is a deficient number, since it is larger than the sum of its proper divisors (1).

520726013 is an equidigital number, since it uses as much as digits as its factorization.

520726013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 520726013 is about 22819.4218375488. The cubic root of 520726013 is about 804.5192211659.

It can be divided in two parts, 52072 and 6013, that added together give a palindrome (58085).

The spelling of 520726013 in words is "five hundred twenty million, seven hundred twenty-six thousand, thirteen".