78730133 has 2 divisors, whose sum is σ = 78730134. Its totient is φ = 78730132.

The previous prime is 78730109. The next prime is 78730153. The reversal of 78730133 is 33103787.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78730129 + 4 = 8873^2 + 2^2 .

It is an emirp because it is prime and its reverse (33103787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78730133 - 2¹⁴ = 78713749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78730133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78730153) 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, 39365066 + 39365067.

It is an arithmetic number, because the mean of its divisors is an integer number (39365067).

Almost surely, 2^78730133 is an apocalyptic number.

It is an amenable number.

78730133 is a deficient number, since it is larger than the sum of its proper divisors (1).

78730133 is an equidigital number, since it uses as much as digits as its factorization.

78730133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 78730133 is about 8873.0002254029. Note that the first 3 decimals coincide. The cubic root of 78730133 is about 428.5948961700.

The spelling of 78730133 in words is "seventy-eight million, seven hundred thirty thousand, one hundred thirty-three".