520342423 has 2 divisors, whose sum is σ = 520342424. Its totient is φ = 520342422.

The previous prime is 520342399. The next prime is 520342453. The reversal of 520342423 is 324243025.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520342423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520342453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260171211 + 260171212.

It is an arithmetic number, because the mean of its divisors is an integer number (260171212).

Almost surely, 2^520342423 is an apocalyptic number.

520342423 is a deficient number, since it is larger than the sum of its proper divisors (1).

520342423 is an equidigital number, since it uses as much as digits as its factorization.

520342423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 520342423 is about 22811.0153873079. The cubic root of 520342423 is about 804.3216243946.

Adding to 520342423 its reverse (324243025), we get a palindrome (844585448).

The spelling of 520342423 in words is "five hundred twenty million, three hundred forty-two thousand, four hundred twenty-three".