9656289997 has 2 divisors, whose sum is σ = 9656289998. Its totient is φ = 9656289996.

The previous prime is 9656289971. The next prime is 9656290087. The reversal of 9656289997 is 7999826569.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8728417476 + 927872521 = 93426^2 + 30461^2 .

It is a cyclic number.

It is not a de Polignac number, because 9656289997 - 2¹⁹ = 9655765709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9656289397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4828144998 + 4828144999.

It is an arithmetic number, because the mean of its divisors is an integer number (4828144999).

Almost surely, 2^9656289997 is an apocalyptic number.

It is an amenable number.

9656289997 is a deficient number, since it is larger than the sum of its proper divisors (1).

9656289997 is an equidigital number, since it uses as much as digits as its factorization.

9656289997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132269760, while the sum is 70.

The square root of 9656289997 is about 98266.4235484329. The cubic root of 9656289997 is about 2129.4630073786.

The spelling of 9656289997 in words is "nine billion, six hundred fifty-six million, two hundred eighty-nine thousand, nine hundred ninety-seven".