6520069 has 2 divisors, whose sum is σ = 6520070. Its totient is φ = 6520068.

The previous prime is 6520067. The next prime is 6520079. The reversal of 6520069 is 9600256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4796100 + 1723969 = 2190^2 + 1313^2 .

It is a cyclic number.

It is not a de Polignac number, because 6520069 - 2¹ = 6520067 is a prime.

It is a super-2 number, since 2×6520069² = 85022599529522, which contains 22 as substring.

Together with 6520067, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6520067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260034 + 3260035.

It is an arithmetic number, because the mean of its divisors is an integer number (3260035).

Almost surely, 2^6520069 is an apocalyptic number.

It is an amenable number.

6520069 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520069 is an equidigital number, since it uses as much as digits as its factorization.

6520069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 6520069 is about 2553.4425781678. The cubic root of 6520069 is about 186.8174316994.

The spelling of 6520069 in words is "six million, five hundred twenty thousand, sixty-nine".