85447903 has 2 divisors, whose sum is σ = 85447904. Its totient is φ = 85447902.

The previous prime is 85447897. The next prime is 85447931. The reversal of 85447903 is 30974458.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85447903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85447963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42723951 + 42723952.

It is an arithmetic number, because the mean of its divisors is an integer number (42723952).

Almost surely, 2^85447903 is an apocalyptic number.

85447903 is a deficient number, since it is larger than the sum of its proper divisors (1).

85447903 is an equidigital number, since it uses as much as digits as its factorization.

85447903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 85447903 is about 9243.8034920697. The cubic root of 85447903 is about 440.4539100227.

The spelling of 85447903 in words is "eighty-five million, four hundred forty-seven thousand, nine hundred three".