85447 has 2 divisors, whose sum is σ = 85448. Its totient is φ = 85446.

The previous prime is 85439. The next prime is 85451. The reversal of 85447 is 74458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85447 - 2³ = 85439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42723 + 42724.

It is an arithmetic number, because the mean of its divisors is an integer number (42724).

2⁸⁵⁴⁴⁷ is an apocalyptic number.

85447 is a deficient number, since it is larger than the sum of its proper divisors (1).

85447 is an equidigital number, since it uses as much as digits as its factorization.

85447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 28.

The square root of 85447 is about 292.3131882074. The cubic root of 85447 is about 44.0452358468.

The spelling of 85447 in words is "eighty-five thousand, four hundred forty-seven".