520423 has 2 divisors, whose sum is σ = 520424. Its totient is φ = 520422.

The previous prime is 520411. The next prime is 520427. The reversal of 520423 is 324025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520423 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 520397 and 520406.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260211 + 260212.

It is an arithmetic number, because the mean of its divisors is an integer number (260212).

2⁵²⁰⁴²³ is an apocalyptic number.

520423 is a deficient number, since it is larger than the sum of its proper divisors (1).

520423 is an equidigital number, since it uses as much as digits as its factorization.

520423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 520423 is about 721.4034931992. The cubic root of 520423 is about 80.4363139671.

Adding to 520423 its reverse (324025), we get a palindrome (844448).

The spelling of 520423 in words is "five hundred twenty thousand, four hundred twenty-three".