78946823 has 2 divisors, whose sum is σ = 78946824. Its totient is φ = 78946822.

The previous prime is 78946811. The next prime is 78946859. The reversal of 78946823 is 32864987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78946823 - 2⁴ = 78946807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78946523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39473411 + 39473412.

It is an arithmetic number, because the mean of its divisors is an integer number (39473412).

Almost surely, 2^78946823 is an apocalyptic number.

78946823 is a deficient number, since it is larger than the sum of its proper divisors (1).

78946823 is an equidigital number, since it uses as much as digits as its factorization.

78946823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 78946823 is about 8885.2024737763. The cubic root of 78946823 is about 428.9877451342.

The spelling of 78946823 in words is "seventy-eight million, nine hundred forty-six thousand, eight hundred twenty-three".