878729330669 has 2 divisors, whose sum is σ = 878729330670. Its totient is φ = 878729330668.

The previous prime is 878729330617. The next prime is 878729330719. The reversal of 878729330669 is 966033927878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 549066180100 + 329663150569 = 740990^2 + 574163^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878729330669 is a prime.

It is a super-2 number, since 2×878729330669² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 878729330599 and 878729330608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878729330069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439364665334 + 439364665335.

It is an arithmetic number, because the mean of its divisors is an integer number (439364665335).

Almost surely, 2^878729330669 is an apocalyptic number.

It is an amenable number.

878729330669 is a deficient number, since it is larger than the sum of its proper divisors (1).

878729330669 is an equidigital number, since it uses as much as digits as its factorization.

878729330669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164602368, while the sum is 68.

The spelling of 878729330669 in words is "eight hundred seventy-eight billion, seven hundred twenty-nine million, three hundred thirty thousand, six hundred sixty-nine".