85686427 has 2 divisors, whose sum is σ = 85686428. Its totient is φ = 85686426.

The previous prime is 85686397. The next prime is 85686437. The reversal of 85686427 is 72468658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85686427 - 2²³ = 77297819 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85686437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42843213 + 42843214.

It is an arithmetic number, because the mean of its divisors is an integer number (42843214).

Almost surely, 2^85686427 is an apocalyptic number.

85686427 is a deficient number, since it is larger than the sum of its proper divisors (1).

85686427 is an equidigital number, since it uses as much as digits as its factorization.

85686427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 46.

The square root of 85686427 is about 9256.6963329257. The cubic root of 85686427 is about 440.8633650645.

The spelling of 85686427 in words is "eighty-five million, six hundred eighty-six thousand, four hundred twenty-seven".