520531129 has 2 divisors, whose sum is σ = 520531130. Its totient is φ = 520531128.

The previous prime is 520531127. The next prime is 520531171. The reversal of 520531129 is 921135025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421070400 + 99460729 = 20520^2 + 9973^2 .

It is a cyclic number.

It is not a de Polignac number, because 520531129 - 2¹ = 520531127 is a prime.

Together with 520531127, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 520531097 and 520531106.

It is not a weakly prime, because it can be changed into another prime (520531127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260265564 + 260265565.

It is an arithmetic number, because the mean of its divisors is an integer number (260265565).

Almost surely, 2^520531129 is an apocalyptic number.

It is an amenable number.

520531129 is a deficient number, since it is larger than the sum of its proper divisors (1).

520531129 is an equidigital number, since it uses as much as digits as its factorization.

520531129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 520531129 is about 22815.1513034650. The cubic root of 520531129 is about 804.4188436906.

The spelling of 520531129 in words is "five hundred twenty million, five hundred thirty-one thousand, one hundred twenty-nine".