86278057 has 2 divisors, whose sum is σ = 86278058. Its totient is φ = 86278056.

The previous prime is 86278051. The next prime is 86278151. The reversal of 86278057 is 75087268.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44235801 + 42042256 = 6651^2 + 6484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86278057 is a prime.

It is not a weakly prime, because it can be changed into another prime (86278051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43139028 + 43139029.

It is an arithmetic number, because the mean of its divisors is an integer number (43139029).

Almost surely, 2^86278057 is an apocalyptic number.

It is an amenable number.

86278057 is a deficient number, since it is larger than the sum of its proper divisors (1).

86278057 is an equidigital number, since it uses as much as digits as its factorization.

86278057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 86278057 is about 9288.5982257820. The cubic root of 86278057 is about 441.8756995735.

The spelling of 86278057 in words is "eighty-six million, two hundred seventy-eight thousand, fifty-seven".