8506905917 has 4 divisors (see below), whose sum is σ = 8594606076. Its totient is φ = 8419205760.

The previous prime is 8506905871. The next prime is 8506905919. The reversal of 8506905917 is 7195096058.

It is a happy number.

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 6130733401 + 2376172516 = 78299^2 + 48746^2 .

It is a cyclic number.

It is not a de Polignac number, because 8506905917 - 2³⁰ = 7433164093 is a prime.

It is a super-2 number, since 2×8506905917² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8506905919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43849934 + ... + 43850127.

It is an arithmetic number, because the mean of its divisors is an integer number (2148651519).

Almost surely, 2^8506905917 is an apocalyptic number.

It is an amenable number.

8506905917 is a deficient number, since it is larger than the sum of its proper divisors (87700159).

8506905917 is an equidigital number, since it uses as much as digits as its factorization.

8506905917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87700158.

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 8506905917 is about 92232.8895622380. The cubic root of 8506905917 is about 2041.3800988221.

The spelling of 8506905917 in words is "eight billion, five hundred six million, nine hundred five thousand, nine hundred seventeen".