905984917 has 2 divisors, whose sum is σ = 905984918. Its totient is φ = 905984916.

The previous prime is 905984909. The next prime is 905984929. The reversal of 905984917 is 719489509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 811623121 + 94361796 = 28489^2 + 9714^2 .

It is a cyclic number.

It is not a de Polignac number, because 905984917 - 2³ = 905984909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (905984977) 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, 452992458 + 452992459.

It is an arithmetic number, because the mean of its divisors is an integer number (452992459).

Almost surely, 2^905984917 is an apocalyptic number.

It is an amenable number.

905984917 is a deficient number, since it is larger than the sum of its proper divisors (1).

905984917 is an equidigital number, since it uses as much as digits as its factorization.

905984917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 52.

The square root of 905984917 is about 30099.5833359866. The cubic root of 905984917 is about 967.6247966024.

The spelling of 905984917 in words is "nine hundred five million, nine hundred eighty-four thousand, nine hundred seventeen".