520620109 has 2 divisors, whose sum is σ = 520620110. Its totient is φ = 520620108.

The previous prime is 520620103. The next prime is 520620119. The reversal of 520620109 is 901026025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343064484 + 177555625 = 18522^2 + 13325^2 .

It is a cyclic number.

It is not a de Polignac number, because 520620109 - 2⁵ = 520620077 is a prime.

It is a super-3 number, since 3×520620109³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520620103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260310054 + 260310055.

It is an arithmetic number, because the mean of its divisors is an integer number (260310055).

Almost surely, 2^520620109 is an apocalyptic number.

It is an amenable number.

520620109 is a deficient number, since it is larger than the sum of its proper divisors (1).

520620109 is an equidigital number, since it uses as much as digits as its factorization.

520620109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 520620109 is about 22817.1012400787. The cubic root of 520620109 is about 804.4646770754.

The spelling of 520620109 in words is "five hundred twenty million, six hundred twenty thousand, one hundred nine".