85547801 has 2 divisors, whose sum is σ = 85547802. Its totient is φ = 85547800.

The previous prime is 85547797. The next prime is 85547809. The reversal of 85547801 is 10874558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55517401 + 30030400 = 7451^2 + 5480^2 .

It is a cyclic number.

It is not a de Polignac number, because 85547801 - 2² = 85547797 is a prime.

It is not a weakly prime, because it can be changed into another prime (85547809) 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, 42773900 + 42773901.

It is an arithmetic number, because the mean of its divisors is an integer number (42773901).

Almost surely, 2^85547801 is an apocalyptic number.

It is an amenable number.

85547801 is a deficient number, since it is larger than the sum of its proper divisors (1).

85547801 is an equidigital number, since it uses as much as digits as its factorization.

85547801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 85547801 is about 9249.2054253325. The cubic root of 85547801 is about 440.6254895355.

The spelling of 85547801 in words is "eighty-five million, five hundred forty-seven thousand, eight hundred one".