86730779 has 2 divisors, whose sum is σ = 86730780. Its totient is φ = 86730778.

The previous prime is 86730667. The next prime is 86730797. The reversal of 86730779 is 97703768.

Together with next prime (86730797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86730779 - 2¹² = 86726683 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86730979) 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, 43365389 + 43365390.

It is an arithmetic number, because the mean of its divisors is an integer number (43365390).

Almost surely, 2^86730779 is an apocalyptic number.

86730779 is a deficient number, since it is larger than the sum of its proper divisors (1).

86730779 is an equidigital number, since it uses as much as digits as its factorization.

86730779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 86730779 is about 9312.9361105937. The cubic root of 86730779 is about 442.6472281856.

The spelling of 86730779 in words is "eighty-six million, seven hundred thirty thousand, seven hundred seventy-nine".