520447 has 2 divisors, whose sum is σ = 520448. Its totient is φ = 520446.

The previous prime is 520433. The next prime is 520451. The reversal of 520447 is 744025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520447 is a prime.

It is a Chen prime.

520447 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260223 + 260224.

It is an arithmetic number, because the mean of its divisors is an integer number (260224).

2⁵²⁰⁴⁴⁷ is an apocalyptic number.

520447 is a deficient number, since it is larger than the sum of its proper divisors (1).

520447 is an equidigital number, since it uses as much as digits as its factorization.

520447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 520447 is about 721.4201272490. The cubic root of 520447 is about 80.4375504240.

The spelling of 520447 in words is "five hundred twenty thousand, four hundred forty-seven".