520509461 has 2 divisors, whose sum is σ = 520509462. Its totient is φ = 520509460.

The previous prime is 520509421. The next prime is 520509467. The reversal of 520509461 is 164905025.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287946961 + 232562500 = 16969^2 + 15250^2 .

It is a cyclic number.

It is not a de Polignac number, because 520509461 - 2⁶ = 520509397 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 (520509467) 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, 260254730 + 260254731.

It is an arithmetic number, because the mean of its divisors is an integer number (260254731).

Almost surely, 2^520509461 is an apocalyptic number.

It is an amenable number.

520509461 is a deficient number, since it is larger than the sum of its proper divisors (1).

520509461 is an equidigital number, since it uses as much as digits as its factorization.

520509461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 520509461 is about 22814.6764386436. The cubic root of 520509461 is about 804.4076817649.

The spelling of 520509461 in words is "five hundred twenty million, five hundred nine thousand, four hundred sixty-one".