86548729 has 2 divisors, whose sum is σ = 86548730. Its totient is φ = 86548728.

The previous prime is 86548703. The next prime is 86548733. The reversal of 86548729 is 92784568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53509225 + 33039504 = 7315^2 + 5748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86548729 is a prime.

It is not a weakly prime, because it can be changed into another prime (86548739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43274364 + 43274365.

It is an arithmetic number, because the mean of its divisors is an integer number (43274365).

Almost surely, 2^86548729 is an apocalyptic number.

It is an amenable number.

86548729 is a deficient number, since it is larger than the sum of its proper divisors (1).

86548729 is an equidigital number, since it uses as much as digits as its factorization.

86548729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 49.

The square root of 86548729 is about 9303.1569372982. The cubic root of 86548729 is about 442.3373021624.

It can be divided in two parts, 865 and 48729, that added together give a palindrome (49594).

The spelling of 86548729 in words is "eighty-six million, five hundred forty-eight thousand, seven hundred twenty-nine".