78559223 has 2 divisors, whose sum is σ = 78559224. Its totient is φ = 78559222.

The previous prime is 78559219. The next prime is 78559241. The reversal of 78559223 is 32295587.

It is a weak prime.

It is an emirp because it is prime and its reverse (32295587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78559223 - 2² = 78559219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78559253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39279611 + 39279612.

It is an arithmetic number, because the mean of its divisors is an integer number (39279612).

Almost surely, 2^78559223 is an apocalyptic number.

78559223 is a deficient number, since it is larger than the sum of its proper divisors (1).

78559223 is an equidigital number, since it uses as much as digits as its factorization.

78559223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 78559223 is about 8863.3640904569. The cubic root of 78559223 is about 428.2845354467.

The spelling of 78559223 in words is "seventy-eight million, five hundred fifty-nine thousand, two hundred twenty-three".