78875773 has 2 divisors, whose sum is σ = 78875774. Its totient is φ = 78875772.

The previous prime is 78875761. The next prime is 78875789. The reversal of 78875773 is 37757887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52229529 + 26646244 = 7227^2 + 5162^2 .

It is an emirp because it is prime and its reverse (37757887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78875773 - 2⁹ = 78875261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78875773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78815773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39437886 + 39437887.

It is an arithmetic number, because the mean of its divisors is an integer number (39437887).

Almost surely, 2^78875773 is an apocalyptic number.

It is an amenable number.

78875773 is a deficient number, since it is larger than the sum of its proper divisors (1).

78875773 is an equidigital number, since it uses as much as digits as its factorization.

78875773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304960, while the sum is 52.

The square root of 78875773 is about 8881.2033531498. The cubic root of 78875773 is about 428.8590140622.

The spelling of 78875773 in words is "seventy-eight million, eight hundred seventy-five thousand, seven hundred seventy-three".