9617647121 has 2 divisors, whose sum is σ = 9617647122. Its totient is φ = 9617647120.

The previous prime is 9617647093. The next prime is 9617647181. The reversal of 9617647121 is 1217467169.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9359595025 + 258052096 = 96745^2 + 16064^2 .

It is a cyclic number.

It is not a de Polignac number, because 9617647121 - 2¹⁸ = 9617384977 is a prime.

It is a super-2 number, since 2×9617647121² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9617647181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4808823560 + 4808823561.

It is an arithmetic number, because the mean of its divisors is an integer number (4808823561).

Almost surely, 2^9617647121 is an apocalyptic number.

It is an amenable number.

9617647121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9617647121 is an equidigital number, since it uses as much as digits as its factorization.

9617647121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 9617647121 is about 98069.6034508145. The cubic root of 9617647121 is about 2126.6186234559.

The spelling of 9617647121 in words is "nine billion, six hundred seventeen million, six hundred forty-seven thousand, one hundred twenty-one".