86715493 has 2 divisors, whose sum is σ = 86715494. Its totient is φ = 86715492.

The previous prime is 86715443. The next prime is 86715547. The reversal of 86715493 is 39451768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82846404 + 3869089 = 9102^2 + 1967^2 .

It is a cyclic number.

It is not a de Polignac number, because 86715493 - 2⁹ = 86714981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86715403) 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, 43357746 + 43357747.

It is an arithmetic number, because the mean of its divisors is an integer number (43357747).

Almost surely, 2^86715493 is an apocalyptic number.

It is an amenable number.

86715493 is a deficient number, since it is larger than the sum of its proper divisors (1).

86715493 is an equidigital number, since it uses as much as digits as its factorization.

86715493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 86715493 is about 9312.1153880308. The cubic root of 86715493 is about 442.6212216430.

The spelling of 86715493 in words is "eighty-six million, seven hundred fifteen thousand, four hundred ninety-three".