85266617 has 2 divisors, whose sum is σ = 85266618. Its totient is φ = 85266616.

The previous prime is 85266613. The next prime is 85266619. The reversal of 85266617 is 71666258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83247376 + 2019241 = 9124^2 + 1421^2 .

It is a cyclic number.

It is not a de Polignac number, because 85266617 - 2² = 85266613 is a prime.

Together with 85266619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85266613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42633308 + 42633309.

It is an arithmetic number, because the mean of its divisors is an integer number (42633309).

Almost surely, 2^85266617 is an apocalyptic number.

It is an amenable number.

85266617 is a deficient number, since it is larger than the sum of its proper divisors (1).

85266617 is an equidigital number, since it uses as much as digits as its factorization.

85266617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 85266617 is about 9233.9924734646. The cubic root of 85266617 is about 440.1422009388.

It can be divided in two parts, 8 and 5266617, that added together give a palindrome (5266625).

The spelling of 85266617 in words is "eighty-five million, two hundred sixty-six thousand, six hundred seventeen".