9840673427979 has 4 divisors (see below), whose sum is σ = 13120897903976. Its totient is φ = 6560448951984.

The previous prime is 9840673427971. The next prime is 9840673428029. The reversal of 9840673427979 is 9797243760489.

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

It is not a de Polignac number, because 9840673427979 - 2³ = 9840673427971 is a prime.

It is a super-5 number, since 5×9840673427979⁵ (a number of 66 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9840673427979.

It is not an unprimeable number, because it can be changed into a prime (9840673427971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640112237994 + ... + 1640112237999.

It is an arithmetic number, because the mean of its divisors is an integer number (3280224475994).

Almost surely, 2^{9840673427979} is an apocalyptic number.

9840673427979 is a deficient number, since it is larger than the sum of its proper divisors (3280224475997).

9840673427979 is a wasteful number, since it uses less digits than its factorization.

9840673427979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280224475996.

The product of its (nonzero) digits is 1152216576, while the sum is 75.

The spelling of 9840673427979 in words is "nine trillion, eight hundred forty billion, six hundred seventy-three million, four hundred twenty-seven thousand, nine hundred seventy-nine".