86928780647 has 2 divisors, whose sum is σ = 86928780648. Its totient is φ = 86928780646.

The previous prime is 86928780619. The next prime is 86928780649. The reversal of 86928780647 is 74608782968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86928780647 - 2⁶ = 86928780583 is a prime.

It is a super-2 number, since 2×86928780647² (a number of 23 digits) contains 22 as substring.

Together with 86928780649, 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 (86928780649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43464390323 + 43464390324.

It is an arithmetic number, because the mean of its divisors is an integer number (43464390324).

Almost surely, 2^86928780647 is an apocalyptic number.

86928780647 is a deficient number, since it is larger than the sum of its proper divisors (1).

86928780647 is an equidigital number, since it uses as much as digits as its factorization.

86928780647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65028096, while the sum is 65.

The spelling of 86928780647 in words is "eighty-six billion, nine hundred twenty-eight million, seven hundred eighty thousand, six hundred forty-seven".