78783311 has 2 divisors, whose sum is σ = 78783312. Its totient is φ = 78783310.

The previous prime is 78783283. The next prime is 78783317. The reversal of 78783311 is 11338787.

It is a strong prime.

It is an emirp because it is prime and its reverse (11338787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78783311 - 2⁶ = 78783247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78783317) 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, 39391655 + 39391656.

It is an arithmetic number, because the mean of its divisors is an integer number (39391656).

Almost surely, 2^78783311 is an apocalyptic number.

78783311 is a deficient number, since it is larger than the sum of its proper divisors (1).

78783311 is an equidigital number, since it uses as much as digits as its factorization.

78783311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 78783311 is about 8875.9963384400. The cubic root of 78783311 is about 428.6913721057.

The spelling of 78783311 in words is "seventy-eight million, seven hundred eighty-three thousand, three hundred eleven".