520000069 has 2 divisors, whose sum is σ = 520000070. Its totient is φ = 520000068.

The previous prime is 520000021. The next prime is 520000079. The reversal of 520000069 is 960000025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 515744100 + 4255969 = 22710^2 + 2063^2 .

It is a cyclic number.

It is not a de Polignac number, because 520000069 - 2⁷ = 519999941 is a prime.

It is a super-2 number, since 2×520000069² = 540800143520009522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520000009) 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, 260000034 + 260000035.

It is an arithmetic number, because the mean of its divisors is an integer number (260000035).

Almost surely, 2^520000069 is an apocalyptic number.

It is an amenable number.

520000069 is a deficient number, since it is larger than the sum of its proper divisors (1).

520000069 is an equidigital number, since it uses as much as digits as its factorization.

520000069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 520000069 is about 22803.5100149078. The cubic root of 520000069 is about 804.1451872858.

The spelling of 520000069 in words is "five hundred twenty million, sixty-nine", and thus it is an aban number.