78896869873 has 2 divisors, whose sum is σ = 78896869874. Its totient is φ = 78896869872.

The previous prime is 78896869871. The next prime is 78896869907. The reversal of 78896869873 is 37896869887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46144195344 + 32752674529 = 214812^2 + 180977^2 .

It is a cyclic number.

It is not a de Polignac number, because 78896869873 - 2¹ = 78896869871 is a prime.

It is a super-3 number, since 3×78896869873³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 78896869871, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 78896869793 and 78896869802.

It is not a weakly prime, because it can be changed into another prime (78896869871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39448434936 + 39448434937.

It is an arithmetic number, because the mean of its divisors is an integer number (39448434937).

Almost surely, 2^78896869873 is an apocalyptic number.

It is an amenable number.

78896869873 is a deficient number, since it is larger than the sum of its proper divisors (1).

78896869873 is an equidigital number, since it uses as much as digits as its factorization.

78896869873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1755758592, while the sum is 79.

The spelling of 78896869873 in words is "seventy-eight billion, eight hundred ninety-six million, eight hundred sixty-nine thousand, eight hundred seventy-three".