86278193 has 2 divisors, whose sum is σ = 86278194. Its totient is φ = 86278192.

The previous prime is 86278151. The next prime is 86278211. The reversal of 86278193 is 39187268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45535504 + 40742689 = 6748^2 + 6383^2 .

It is a cyclic number.

It is not a de Polignac number, because 86278193 - 2¹⁶ = 86212657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (86278993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43139096 + 43139097.

It is an arithmetic number, because the mean of its divisors is an integer number (43139097).

Almost surely, 2^86278193 is an apocalyptic number.

It is an amenable number.

86278193 is a deficient number, since it is larger than the sum of its proper divisors (1).

86278193 is an equidigital number, since it uses as much as digits as its factorization.

86278193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 86278193 is about 9288.6055465823. The cubic root of 86278193 is about 441.8759317494.

The spelling of 86278193 in words is "eighty-six million, two hundred seventy-eight thousand, one hundred ninety-three".