78853823 has 2 divisors, whose sum is σ = 78853824. Its totient is φ = 78853822.

The previous prime is 78853811. The next prime is 78853937. The reversal of 78853823 is 32835887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78853823 - 2⁶ = 78853759 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78856823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39426911 + 39426912.

It is an arithmetic number, because the mean of its divisors is an integer number (39426912).

Almost surely, 2^78853823 is an apocalyptic number.

78853823 is a deficient number, since it is larger than the sum of its proper divisors (1).

78853823 is an equidigital number, since it uses as much as digits as its factorization.

78853823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 44.

The square root of 78853823 is about 8879.9675112018. The cubic root of 78853823 is about 428.8192285939.

The spelling of 78853823 in words is "seventy-eight million, eight hundred fifty-three thousand, eight hundred twenty-three".