86938513 has 2 divisors, whose sum is σ = 86938514. Its totient is φ = 86938512.

The previous prime is 86938507. The next prime is 86938519. The reversal of 86938513 is 31583968.

It is a balanced prime because it is at equal distance from previous prime (86938507) and next prime (86938519).

It can be written as a sum of positive squares in only one way, i.e., 71351809 + 15586704 = 8447^2 + 3948^2 .

It is a cyclic number.

It is not a de Polignac number, because 86938513 - 2⁹ = 86938001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86938513.

It is not a weakly prime, because it can be changed into another prime (86938519) 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, 43469256 + 43469257.

It is an arithmetic number, because the mean of its divisors is an integer number (43469257).

Almost surely, 2^86938513 is an apocalyptic number.

It is an amenable number.

86938513 is a deficient number, since it is larger than the sum of its proper divisors (1).

86938513 is an equidigital number, since it uses as much as digits as its factorization.

86938513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 86938513 is about 9324.0824213431. The cubic root of 86938513 is about 443.0003498953. Note that the first 3 decimals are identical.

The spelling of 86938513 in words is "eighty-six million, nine hundred thirty-eight thousand, five hundred thirteen".