86780773 has 2 divisors, whose sum is σ = 86780774. Its totient is φ = 86780772.

The previous prime is 86780761. The next prime is 86780777. The reversal of 86780773 is 37708768.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73582084 + 13198689 = 8578^2 + 3633^2 .

It is a cyclic number.

It is not a de Polignac number, because 86780773 - 2⁵ = 86780741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86780777) 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, 43390386 + 43390387.

It is an arithmetic number, because the mean of its divisors is an integer number (43390387).

Almost surely, 2^86780773 is an apocalyptic number.

It is an amenable number.

86780773 is a deficient number, since it is larger than the sum of its proper divisors (1).

86780773 is an equidigital number, since it uses as much as digits as its factorization.

86780773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 86780773 is about 9315.6198398174. The cubic root of 86780773 is about 442.7322631835.

The spelling of 86780773 in words is "eighty-six million, seven hundred eighty thousand, seven hundred seventy-three".