520969 has 2 divisors, whose sum is σ = 520970. Its totient is φ = 520968.

The previous prime is 520967. The next prime is 520981. The reversal of 520969 is 969025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344569 + 176400 = 587^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 520969 - 2¹ = 520967 is a prime.

It is a super-2 number, since 2×520969² = 542817397922, which contains 22 as substring.

Together with 520967, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 520969.

It is not a weakly prime, because it can be changed into another prime (520963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260484 + 260485.

It is an arithmetic number, because the mean of its divisors is an integer number (260485).

2⁵²⁰⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

520969 is a deficient number, since it is larger than the sum of its proper divisors (1).

520969 is an equidigital number, since it uses as much as digits as its factorization.

520969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 520969 is about 721.7818229909. The cubic root of 520969 is about 80.4644339627.

It can be divided in two parts, 52096 and 9, that multiplied together give a palindrome (468864).

The spelling of 520969 in words is "five hundred twenty thousand, nine hundred sixty-nine".