9728167609 has 2 divisors, whose sum is σ = 9728167610. Its totient is φ = 9728167608.

The previous prime is 9728167571. The next prime is 9728167619. The reversal of 9728167609 is 9067618279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6520078009 + 3208089600 = 80747^2 + 56640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9728167609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9728167609.

It is not a weakly prime, because it can be changed into another prime (9728167619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864083804 + 4864083805.

It is an arithmetic number, because the mean of its divisors is an integer number (4864083805).

Almost surely, 2^9728167609 is an apocalyptic number.

It is an amenable number.

9728167609 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728167609 is an equidigital number, since it uses as much as digits as its factorization.

9728167609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The square root of 9728167609 is about 98631.4737241617. The cubic root of 9728167609 is about 2134.7335789985.

The spelling of 9728167609 in words is "nine billion, seven hundred twenty-eight million, one hundred sixty-seven thousand, six hundred nine".