78822533 has 2 divisors, whose sum is σ = 78822534. Its totient is φ = 78822532.

The previous prime is 78822529. The next prime is 78822563. The reversal of 78822533 is 33522887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61199329 + 17623204 = 7823^2 + 4198^2 .

It is an emirp because it is prime and its reverse (33522887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78822533 - 2² = 78822529 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78822563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39411266 + 39411267.

It is an arithmetic number, because the mean of its divisors is an integer number (39411267).

Almost surely, 2^78822533 is an apocalyptic number.

It is an amenable number.

78822533 is a deficient number, since it is larger than the sum of its proper divisors (1).

78822533 is an equidigital number, since it uses as much as digits as its factorization.

78822533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 78822533 is about 8878.2055056188. The cubic root of 78822533 is about 428.7625011442.

The spelling of 78822533 in words is "seventy-eight million, eight hundred twenty-two thousand, five hundred thirty-three".