78776323 has 2 divisors, whose sum is σ = 78776324. Its totient is φ = 78776322.

The previous prime is 78776279. The next prime is 78776329. The reversal of 78776323 is 32367787.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78776323 - 2⁹ = 78775811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78776323.

It is not a weakly prime, because it can be changed into another prime (78776329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39388161 + 39388162.

It is an arithmetic number, because the mean of its divisors is an integer number (39388162).

Almost surely, 2^78776323 is an apocalyptic number.

78776323 is a deficient number, since it is larger than the sum of its proper divisors (1).

78776323 is an equidigital number, since it uses as much as digits as its factorization.

78776323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 43.

The square root of 78776323 is about 8875.6026837618. The cubic root of 78776323 is about 428.6786969006.

The spelling of 78776323 in words is "seventy-eight million, seven hundred seventy-six thousand, three hundred twenty-three".