86278817 has 2 divisors, whose sum is σ = 86278818. Its totient is φ = 86278816.

The previous prime is 86278811. The next prime is 86278837. The reversal of 86278817 is 71887268.

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., 59228416 + 27050401 = 7696^2 + 5201^2 .

It is a cyclic number.

It is not a de Polignac number, because 86278817 - 2¹⁸ = 86016673 is a prime.

It is not a weakly prime, because it can be changed into another prime (86278811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43139408 + 43139409.

It is an arithmetic number, because the mean of its divisors is an integer number (43139409).

Almost surely, 2^86278817 is an apocalyptic number.

It is an amenable number.

86278817 is a deficient number, since it is larger than the sum of its proper divisors (1).

86278817 is an equidigital number, since it uses as much as digits as its factorization.

86278817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 301056, while the sum is 47.

The square root of 86278817 is about 9288.6391360629. The cubic root of 86278817 is about 441.8769970241.

The spelling of 86278817 in words is "eighty-six million, two hundred seventy-eight thousand, eight hundred seventeen".