520305479 has 2 divisors, whose sum is σ = 520305480. Its totient is φ = 520305478.

The previous prime is 520305431. The next prime is 520305497. The reversal of 520305479 is 974503025.

Together with next prime (520305497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520305479 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520307479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260152739 + 260152740.

It is an arithmetic number, because the mean of its divisors is an integer number (260152740).

Almost surely, 2^520305479 is an apocalyptic number.

520305479 is a deficient number, since it is larger than the sum of its proper divisors (1).

520305479 is an equidigital number, since it uses as much as digits as its factorization.

520305479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 520305479 is about 22810.2055887272. The cubic root of 520305479 is about 804.3025884931.

The spelling of 520305479 in words is "five hundred twenty million, three hundred five thousand, four hundred seventy-nine".