86520613 has 2 divisors, whose sum is σ = 86520614. Its totient is φ = 86520612.

The previous prime is 86520571. The next prime is 86520677. The reversal of 86520613 is 31602568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79977249 + 6543364 = 8943^2 + 2558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86520613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86520683) 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, 43260306 + 43260307.

It is an arithmetic number, because the mean of its divisors is an integer number (43260307).

Almost surely, 2^86520613 is an apocalyptic number.

It is an amenable number.

86520613 is a deficient number, since it is larger than the sum of its proper divisors (1).

86520613 is an equidigital number, since it uses as much as digits as its factorization.

86520613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 86520613 is about 9301.6457146034. The cubic root of 86520613 is about 442.2893981177.

The spelling of 86520613 in words is "eighty-six million, five hundred twenty thousand, six hundred thirteen".