8427585905 has 4 divisors (see below), whose sum is σ = 10113103092. Its totient is φ = 6742068720.

The previous prime is 8427585889. The next prime is 8427585923. The reversal of 8427585905 is 5095857248.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2338592881 + 6088993024 = 48359^2 + 78032^2 .

It is not a de Polignac number, because 8427585905 - 2⁴ = 8427585889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 842758586 + ... + 842758595.

It is an arithmetic number, because the mean of its divisors is an integer number (2528275773).

Almost surely, 2^8427585905 is an apocalyptic number.

It is an amenable number.

8427585905 is a deficient number, since it is larger than the sum of its proper divisors (1685517187).

8427585905 is a wasteful number, since it uses less digits than its factorization.

8427585905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685517186.

The product of its (nonzero) digits is 4032000, while the sum is 53.

The square root of 8427585905 is about 91801.8839948288. The cubic root of 8427585905 is about 2035.0155371519.

The spelling of 8427585905 in words is "eight billion, four hundred twenty-seven million, five hundred eighty-five thousand, nine hundred five".