979744856869 has 2 divisors, whose sum is σ = 979744856870. Its totient is φ = 979744856868.

The previous prime is 979744856837. The next prime is 979744856887. The reversal of 979744856869 is 968658447979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 957755822500 + 21989034369 = 978650^2 + 148287^2 .

It is a cyclic number.

It is not a de Polignac number, because 979744856869 - 2⁵ = 979744856837 is a prime.

It is a super-2 number, since 2×979744856869² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 979744856792 and 979744856801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (979744856669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489872428434 + 489872428435.

It is an arithmetic number, because the mean of its divisors is an integer number (489872428435).

Almost surely, 2^979744856869 is an apocalyptic number.

It is an amenable number.

979744856869 is a deficient number, since it is larger than the sum of its proper divisors (1).

979744856869 is an equidigital number, since it uses as much as digits as its factorization.

979744856869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6584094720, while the sum is 82.

The spelling of 979744856869 in words is "nine hundred seventy-nine billion, seven hundred forty-four million, eight hundred fifty-six thousand, eight hundred sixty-nine".