84608905 has 12 divisors (see below), whose sum is σ = 102516300. Its totient is φ = 67033344.

The previous prime is 84608903. The next prime is 84608917. The reversal of 84608905 is 50980648.

It can be written as a sum of positive squares in 6 ways, for example, as 21501769 + 63107136 = 4637^2 + 7944^2 .

It is not a de Polignac number, because 84608905 - 2¹ = 84608903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84608903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250897 + ... + 251233.

It is an arithmetic number, because the mean of its divisors is an integer number (8543025).

Almost surely, 2^84608905 is an apocalyptic number.

It is an amenable number.

84608905 is a deficient number, since it is larger than the sum of its proper divisors (17907395).

84608905 is an equidigital number, since it uses as much as digits as its factorization.

84608905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 84608905 is about 9198.3098991065. The cubic root of 84608905 is about 439.0075859649.

The spelling of 84608905 in words is "eighty-four million, six hundred eight thousand, nine hundred five".