78773323 has 2 divisors, whose sum is σ = 78773324. Its totient is φ = 78773322.

The previous prime is 78773281. The next prime is 78773329. The reversal of 78773323 is 32337787.

It is a strong prime.

It is an emirp because it is prime and its reverse (32337787) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78773323 is a prime.

It is not a weakly prime, because it can be changed into another prime (78773329) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39386661 + 39386662.

It is an arithmetic number, because the mean of its divisors is an integer number (39386662).

Almost surely, 2^78773323 is an apocalyptic number.

78773323 is a deficient number, since it is larger than the sum of its proper divisors (1).

78773323 is an equidigital number, since it uses as much as digits as its factorization.

78773323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148176, while the sum is 40.

The square root of 78773323 is about 8875.4336795449. The cubic root of 78773323 is about 428.6732551115.

The spelling of 78773323 in words is "seventy-eight million, seven hundred seventy-three thousand, three hundred twenty-three".