85278317 has 2 divisors, whose sum is σ = 85278318. Its totient is φ = 85278316.

The previous prime is 85278311. The next prime is 85278329. The reversal of 85278317 is 71387258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70997476 + 14280841 = 8426^2 + 3779^2 .

It is a cyclic number.

It is not a de Polignac number, because 85278317 - 2¹⁰ = 85277293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85278311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42639158 + 42639159.

It is an arithmetic number, because the mean of its divisors is an integer number (42639159).

Almost surely, 2^85278317 is an apocalyptic number.

It is an amenable number.

85278317 is a deficient number, since it is larger than the sum of its proper divisors (1).

85278317 is an equidigital number, since it uses as much as digits as its factorization.

85278317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 41.

The square root of 85278317 is about 9234.6259805149. The cubic root of 85278317 is about 440.1623316317.

The spelling of 85278317 in words is "eighty-five million, two hundred seventy-eight thousand, three hundred seventeen".