86166719 has 2 divisors, whose sum is σ = 86166720. Its totient is φ = 86166718.

The previous prime is 86166713. The next prime is 86166733. The reversal of 86166719 is 91766168.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86166719 is a prime.

It is a super-2 number, since 2×86166719² = 14849406926449922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86166719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86166713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43083359 + 43083360.

It is an arithmetic number, because the mean of its divisors is an integer number (43083360).

Almost surely, 2^86166719 is an apocalyptic number.

86166719 is a deficient number, since it is larger than the sum of its proper divisors (1).

86166719 is an equidigital number, since it uses as much as digits as its factorization.

86166719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 86166719 is about 9282.6030293232. The cubic root of 86166719 is about 441.6855441004.

The spelling of 86166719 in words is "eighty-six million, one hundred sixty-six thousand, seven hundred nineteen".