9643973679 has 24 divisors (see below), whose sum is σ = 14199494400. Its totient is φ = 6305530320.

The previous prime is 9643973617. The next prime is 9643973681. The reversal of 9643973679 is 9763793469.

It is not a de Polignac number, because 9643973679 - 2¹⁹ = 9643449391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9643973699) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207792 + ... + 249930.

It is an arithmetic number, because the mean of its divisors is an integer number (591645600).

Almost surely, 2^9643973679 is an apocalyptic number.

9643973679 is a deficient number, since it is larger than the sum of its proper divisors (4555520721).

9643973679 is a wasteful number, since it uses less digits than its factorization.

9643973679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42635 (or 42632 counting only the distinct ones).

The product of its digits is 46294416, while the sum is 63.

The square root of 9643973679 is about 98203.7355654050. The cubic root of 9643973679 is about 2128.5572660729.

The spelling of 9643973679 in words is "nine billion, six hundred forty-three million, nine hundred seventy-three thousand, six hundred seventy-nine".