78785843 has 2 divisors, whose sum is σ = 78785844. Its totient is φ = 78785842.

The previous prime is 78785821. The next prime is 78785851. The reversal of 78785843 is 34858787.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78785843 - 2¹⁶ = 78720307 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78785791 and 78785800.

It is not a weakly prime, because it can be changed into another prime (78785813) 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, 39392921 + 39392922.

It is an arithmetic number, because the mean of its divisors is an integer number (39392922).

Almost surely, 2^78785843 is an apocalyptic number.

78785843 is a deficient number, since it is larger than the sum of its proper divisors (1).

78785843 is an equidigital number, since it uses as much as digits as its factorization.

78785843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1505280, while the sum is 50.

The square root of 78785843 is about 8876.1389691690. The cubic root of 78785843 is about 428.6959645967.

The spelling of 78785843 in words is "seventy-eight million, seven hundred eighty-five thousand, eight hundred forty-three".