78068579 has 2 divisors, whose sum is σ = 78068580. Its totient is φ = 78068578.

The previous prime is 78068569. The next prime is 78068581. The reversal of 78068579 is 97586087.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (97586087) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78068579 is a prime.

Together with 78068581, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78068519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39034289 + 39034290.

It is an arithmetic number, because the mean of its divisors is an integer number (39034290).

Almost surely, 2^78068579 is an apocalyptic number.

78068579 is a deficient number, since it is larger than the sum of its proper divisors (1).

78068579 is an equidigital number, since it uses as much as digits as its factorization.

78068579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 78068579 is about 8835.6425346434. The cubic root of 78068579 is about 427.3910514292.

The spelling of 78068579 in words is "seventy-eight million, sixty-eight thousand, five hundred seventy-nine".