9617616209 has 4 divisors (see below), whose sum is σ = 9623850816. Its totient is φ = 9611381604.

The previous prime is 9617616149. The next prime is 9617616241. The reversal of 9617616209 is 9026167169.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9026167169 = 6823 ⋅1322903.

It is a cyclic number.

It is not a de Polignac number, because 9617616209 - 2¹⁶ = 9617550673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9617616509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3114989 + ... + 3118074.

It is an arithmetic number, because the mean of its divisors is an integer number (2405962704).

Almost surely, 2^9617616209 is an apocalyptic number.

It is an amenable number.

9617616209 is a deficient number, since it is larger than the sum of its proper divisors (6234607).

9617616209 is a wasteful number, since it uses less digits than its factorization.

9617616209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6234606.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 9617616209 is about 98069.4458483375. The cubic root of 9617616209 is about 2126.6163450711.

The spelling of 9617616209 in words is "nine billion, six hundred seventeen million, six hundred sixteen thousand, two hundred nine".