85447853 has 2 divisors, whose sum is σ = 85447854. Its totient is φ = 85447852.

The previous prime is 85447849. The next prime is 85447867. The reversal of 85447853 is 35874458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72965764 + 12482089 = 8542^2 + 3533^2 .

It is a cyclic number.

It is not a de Polignac number, because 85447853 - 2² = 85447849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_4968278 and since 85447853 and 4968278 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85447823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42723926 + 42723927.

It is an arithmetic number, because the mean of its divisors is an integer number (42723927).

Almost surely, 2^85447853 is an apocalyptic number.

It is an amenable number.

85447853 is a deficient number, since it is larger than the sum of its proper divisors (1).

85447853 is an equidigital number, since it uses as much as digits as its factorization.

85447853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 537600, while the sum is 44.

The square root of 85447853 is about 9243.8007875549. The cubic root of 85447853 is about 440.4538241119.

The spelling of 85447853 in words is "eighty-five million, four hundred forty-seven thousand, eight hundred fifty-three".