78688097 has 2 divisors, whose sum is σ = 78688098. Its totient is φ = 78688096.

The previous prime is 78688073. The next prime is 78688111. The reversal of 78688097 is 79088687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44943616 + 33744481 = 6704^2 + 5809^2 .

It is an emirp because it is prime and its reverse (79088687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78688097 - 2⁸ = 78687841 is a prime.

It is not a weakly prime, because it can be changed into another prime (78688297) 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, 39344048 + 39344049.

It is an arithmetic number, because the mean of its divisors is an integer number (39344049).

Almost surely, 2^78688097 is an apocalyptic number.

It is an amenable number.

78688097 is a deficient number, since it is larger than the sum of its proper divisors (1).

78688097 is an equidigital number, since it uses as much as digits as its factorization.

78688097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The square root of 78688097 is about 8870.6311500366. The cubic root of 78688097 is about 428.5186033886.

The spelling of 78688097 in words is "seventy-eight million, six hundred eighty-eight thousand, ninety-seven".