8409623617 has 8 divisors (see below), whose sum is σ = 8507608200. Its totient is φ = 8311716864.

The previous prime is 8409623603. The next prime is 8409623639. The reversal of 8409623617 is 7163269048.

It is a Cunningham number, because it is equal to 91704²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 8409623616 = 1^2 + 91704^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8409623617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8409623017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214093 + ... + 250309.

It is an arithmetic number, because the mean of its divisors is an integer number (1063451025).

Almost surely, 2^8409623617 is an apocalyptic number.

It is an amenable number.

8409623617 is a deficient number, since it is larger than the sum of its proper divisors (97984583).

8409623617 is a wasteful number, since it uses less digits than its factorization.

8409623617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38915.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 8409623617 is about 91704.0000054523. Note that the first 5 decimals coincide. The cubic root of 8409623617 is about 2033.5687196786.

The spelling of 8409623617 in words is "eight billion, four hundred nine million, six hundred twenty-three thousand, six hundred seventeen".