85247473 has 2 divisors, whose sum is σ = 85247474. Its totient is φ = 85247472.

The previous prime is 85247447. The next prime is 85247531. The reversal of 85247473 is 37474258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60715264 + 24532209 = 7792^2 + 4953^2 .

It is a cyclic number.

It is not a de Polignac number, because 85247473 - 2⁵ = 85247441 is a prime.

It is not a weakly prime, because it can be changed into another prime (85247273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42623736 + 42623737.

It is an arithmetic number, because the mean of its divisors is an integer number (42623737).

Almost surely, 2^85247473 is an apocalyptic number.

It is an amenable number.

85247473 is a deficient number, since it is larger than the sum of its proper divisors (1).

85247473 is an equidigital number, since it uses as much as digits as its factorization.

85247473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 40.

The square root of 85247473 is about 9232.9558105733. The cubic root of 85247473 is about 440.1092583357.

The spelling of 85247473 in words is "eighty-five million, two hundred forty-seven thousand, four hundred seventy-three".