9728167679 has 4 divisors (see below), whose sum is σ = 9731240640. Its totient is φ = 9725094720.

The previous prime is 9728167639. The next prime is 9728167727. The reversal of 9728167679 is 9767618279.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9728167679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9728167609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1531727 + ... + 1538064.

It is an arithmetic number, because the mean of its divisors is an integer number (2432810160).

Almost surely, 2^9728167679 is an apocalyptic number.

9728167679 is a deficient number, since it is larger than the sum of its proper divisors (3072961).

9728167679 is a wasteful number, since it uses less digits than its factorization.

9728167679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3072960.

The product of its digits is 16003008, while the sum is 62.

The square root of 9728167679 is about 98631.4740790180. The cubic root of 9728167679 is about 2134.7335841187.

The spelling of 9728167679 in words is "nine billion, seven hundred twenty-eight million, one hundred sixty-seven thousand, six hundred seventy-nine".