86105779 has 2 divisors, whose sum is σ = 86105780. Its totient is φ = 86105778.

The previous prime is 86105753. The next prime is 86105797. The reversal of 86105779 is 97750168.

Together with next prime (86105797) 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 86105779 - 2⁹ = 86105267 is a prime.

It is not a weakly prime, because it can be changed into another prime (86145779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43052889 + 43052890.

It is an arithmetic number, because the mean of its divisors is an integer number (43052890).

Almost surely, 2^86105779 is an apocalyptic number.

86105779 is a deficient number, since it is larger than the sum of its proper divisors (1).

86105779 is an equidigital number, since it uses as much as digits as its factorization.

86105779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 86105779 is about 9279.3199643077. The cubic root of 86105779 is about 441.5813945895.

The spelling of 86105779 in words is "eighty-six million, one hundred five thousand, seven hundred seventy-nine".