78793873 has 2 divisors, whose sum is σ = 78793874. Its totient is φ = 78793872.

The previous prime is 78793829. The next prime is 78793877. The reversal of 78793873 is 37839787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54508689 + 24285184 = 7383^2 + 4928^2 .

It is an emirp because it is prime and its reverse (37839787) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78793873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78793873.

It is not a weakly prime, because it can be changed into another prime (78793877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39396936 + 39396937.

It is an arithmetic number, because the mean of its divisors is an integer number (39396937).

Almost surely, 2^78793873 is an apocalyptic number.

It is an amenable number.

78793873 is a deficient number, since it is larger than the sum of its proper divisors (1).

78793873 is an equidigital number, since it uses as much as digits as its factorization.

78793873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 52.

The square root of 78793873 is about 8876.5912939596. The cubic root of 78793873 is about 428.7105285992.

The spelling of 78793873 in words is "seventy-eight million, seven hundred ninety-three thousand, eight hundred seventy-three".