9664627909 has 2 divisors, whose sum is σ = 9664627910. Its totient is φ = 9664627908.

The previous prime is 9664627867. The next prime is 9664627937. The reversal of 9664627909 is 9097264669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9329628100 + 334999809 = 96590^2 + 18303^2 .

It is a cyclic number.

It is not a de Polignac number, because 9664627909 - 2¹³ = 9664619717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9664627939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832313954 + 4832313955.

It is an arithmetic number, because the mean of its divisors is an integer number (4832313955).

Almost surely, 2^9664627909 is an apocalyptic number.

It is an amenable number.

9664627909 is a deficient number, since it is larger than the sum of its proper divisors (1).

9664627909 is an equidigital number, since it uses as much as digits as its factorization.

9664627909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 58.

The square root of 9664627909 is about 98308.8394245400. The cubic root of 9664627909 is about 2130.0757398476.

The spelling of 9664627909 in words is "nine billion, six hundred sixty-four million, six hundred twenty-seven thousand, nine hundred nine".