85186447 has 2 divisors, whose sum is σ = 85186448. Its totient is φ = 85186446.

The previous prime is 85186441. The next prime is 85186537. The reversal of 85186447 is 74468158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85186447 - 2²³ = 76797839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85186441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42593223 + 42593224.

It is an arithmetic number, because the mean of its divisors is an integer number (42593224).

Almost surely, 2^85186447 is an apocalyptic number.

85186447 is a deficient number, since it is larger than the sum of its proper divisors (1).

85186447 is an equidigital number, since it uses as much as digits as its factorization.

85186447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 43.

The square root of 85186447 is about 9229.6504267497. The cubic root of 85186447 is about 440.0042131139.

The spelling of 85186447 in words is "eighty-five million, one hundred eighty-six thousand, four hundred forty-seven".