979661957713 has 4 divisors (see below), whose sum is σ = 981162206388. Its totient is φ = 978161709040.

The previous prime is 979661957669. The next prime is 979661957777. The reversal of 979661957713 is 317759166979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 317759166979 = 31 ⋅10250295709.

It can be written as a sum of positive squares in 2 ways, for example, as 180619050049 + 799042907664 = 424993^2 + 893892^2 .

It is a cyclic number.

It is not a de Polignac number, because 979661957713 - 2²¹ = 979659860561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (979661937713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750123358 + ... + 750124663.

It is an arithmetic number, because the mean of its divisors is an integer number (245290551597).

Almost surely, 2^979661957713 is an apocalyptic number.

It is an amenable number.

979661957713 is a deficient number, since it is larger than the sum of its proper divisors (1500248675).

979661957713 is a wasteful number, since it uses less digits than its factorization.

979661957713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500248674.

The product of its digits is 135025380, while the sum is 70.

The spelling of 979661957713 in words is "nine hundred seventy-nine billion, six hundred sixty-one million, nine hundred fifty-seven thousand, seven hundred thirteen".