85786117 has 2 divisors, whose sum is σ = 85786118. Its totient is φ = 85786116.

The previous prime is 85786109. The next prime is 85786153. The reversal of 85786117 is 71168758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80030916 + 5755201 = 8946^2 + 2399^2 .

It is a cyclic number.

It is not a de Polignac number, because 85786117 - 2³ = 85786109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85786157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42893058 + 42893059.

It is an arithmetic number, because the mean of its divisors is an integer number (42893059).

Almost surely, 2^85786117 is an apocalyptic number.

It is an amenable number.

85786117 is a deficient number, since it is larger than the sum of its proper divisors (1).

85786117 is an equidigital number, since it uses as much as digits as its factorization.

85786117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 43.

The square root of 85786117 is about 9262.0795181212. The cubic root of 85786117 is about 441.0342697508.

The spelling of 85786117 in words is "eighty-five million, seven hundred eighty-six thousand, one hundred seventeen".