979999709981 has 8 divisors (see below), whose sum is σ = 994989627744. Its totient is φ = 965020470480.

The previous prime is 979999709929. The next prime is 979999709999. The reversal of 979999709981 is 189907999979.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 979999709981 - 2¹⁰ = 979999708957 is a prime.

It is a super-2 number, since 2×979999709981² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 979999709893 and 979999709902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979999705981) 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 7 ways as a sum of consecutive naturals, for example, 2484515 + ... + 2851808.

It is an arithmetic number, because the mean of its divisors is an integer number (124373703468).

Almost surely, 2^979999709981 is an apocalyptic number.

It is an amenable number.

979999709981 is a deficient number, since it is larger than the sum of its proper divisors (14989917763).

979999709981 is a wasteful number, since it uses less digits than its factorization.

979999709981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5339131.

The product of its (nonzero) digits is 1874923848, while the sum is 86.

The spelling of 979999709981 in words is "nine hundred seventy-nine billion, nine hundred ninety-nine million, seven hundred nine thousand, nine hundred eighty-one".