78568799 has 2 divisors, whose sum is σ = 78568800. Its totient is φ = 78568798.

The previous prime is 78568769. The next prime is 78568817. The reversal of 78568799 is 99786587.

It is a strong prime.

It is an emirp because it is prime and its reverse (99786587) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78568799 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78568729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39284399 + 39284400.

It is an arithmetic number, because the mean of its divisors is an integer number (39284400).

Almost surely, 2^78568799 is an apocalyptic number.

78568799 is a deficient number, since it is larger than the sum of its proper divisors (1).

78568799 is an equidigital number, since it uses as much as digits as its factorization.

78568799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 59.

The square root of 78568799 is about 8863.9042752051. The cubic root of 78568799 is about 428.3019366968.

The spelling of 78568799 in words is "seventy-eight million, five hundred sixty-eight thousand, seven hundred ninety-nine".