78056243 has 2 divisors, whose sum is σ = 78056244. Its totient is φ = 78056242.

The previous prime is 78056221. The next prime is 78056257. The reversal of 78056243 is 34265087.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34265087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78056243 - 2⁸ = 78055987 is a prime.

It is not a weakly prime, because it can be changed into another prime (78056203) 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, 39028121 + 39028122.

It is an arithmetic number, because the mean of its divisors is an integer number (39028122).

Almost surely, 2^78056243 is an apocalyptic number.

78056243 is a deficient number, since it is larger than the sum of its proper divisors (1).

78056243 is an equidigital number, since it uses as much as digits as its factorization.

78056243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 78056243 is about 8834.9444254053. The cubic root of 78056243 is about 427.3685388563.

The spelling of 78056243 in words is "seventy-eight million, fifty-six thousand, two hundred forty-three".