78816467 has 2 divisors, whose sum is σ = 78816468. Its totient is φ = 78816466.

The previous prime is 78816449. The next prime is 78816481. The reversal of 78816467 is 76461887.

It is a strong prime.

It is an emirp because it is prime and its reverse (76461887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78816467 - 2²⁰ = 77767891 is a prime.

It is not a weakly prime, because it can be changed into another prime (78810467) 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, 39408233 + 39408234.

It is an arithmetic number, because the mean of its divisors is an integer number (39408234).

Almost surely, 2^78816467 is an apocalyptic number.

78816467 is a deficient number, since it is larger than the sum of its proper divisors (1).

78816467 is an equidigital number, since it uses as much as digits as its factorization.

78816467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 47.

The square root of 78816467 is about 8877.8638759557. The cubic root of 78816467 is about 428.7515020050.

The spelling of 78816467 in words is "seventy-eight million, eight hundred sixteen thousand, four hundred sixty-seven".