979681019393 has 16 divisors (see below), whose sum is σ = 1041236879760. Its totient is φ = 919995552000.

The previous prime is 979681019371. The next prime is 979681019411. The reversal of 979681019393 is 393910186979.

It can be written as a sum of positive squares in 8 ways, for example, as 734449 + 979680284944 = 857^2 + 989788^2 .

It is a cyclic number.

It is not a de Polignac number, because 979681019393 - 2¹⁰ = 979681018369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (979681019333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2774543 + ... + 3107643.

It is an arithmetic number, because the mean of its divisors is an integer number (65077304985).

Almost surely, 2^979681019393 is an apocalyptic number.

It is an amenable number.

979681019393 is a deficient number, since it is larger than the sum of its proper divisors (61555860367).

979681019393 is a wasteful number, since it uses less digits than its factorization.

979681019393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335908.

The product of its (nonzero) digits is 19840464, while the sum is 65.

The spelling of 979681019393 in words is "nine hundred seventy-nine billion, six hundred eighty-one million, nineteen thousand, three hundred ninety-three".