520421959 has 2 divisors, whose sum is σ = 520421960. Its totient is φ = 520421958.

The previous prime is 520421947. The next prime is 520421963. The reversal of 520421959 is 959124025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520421959 - 2¹³ = 520413767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520421939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260210979 + 260210980.

It is an arithmetic number, because the mean of its divisors is an integer number (260210980).

Almost surely, 2^520421959 is an apocalyptic number.

520421959 is a deficient number, since it is larger than the sum of its proper divisors (1).

520421959 is an equidigital number, since it uses as much as digits as its factorization.

520421959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 520421959 is about 22812.7586889442. The cubic root of 520421959 is about 804.3626033492.

The spelling of 520421959 in words is "five hundred twenty million, four hundred twenty-one thousand, nine hundred fifty-nine".