78888377 has 2 divisors, whose sum is σ = 78888378. Its totient is φ = 78888376.

The previous prime is 78888353. The next prime is 78888379. The reversal of 78888377 is 77388887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51681721 + 27206656 = 7189^2 + 5216^2 .

It is a cyclic number.

It is not a de Polignac number, because 78888377 - 2²⁶ = 11779513 is a prime.

Together with 78888379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78888379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39444188 + 39444189.

It is an arithmetic number, because the mean of its divisors is an integer number (39444189).

Almost surely, 2^78888377 is an apocalyptic number.

It is an amenable number.

78888377 is a deficient number, since it is larger than the sum of its proper divisors (1).

78888377 is an equidigital number, since it uses as much as digits as its factorization.

78888377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4214784, while the sum is 56.

The square root of 78888377 is about 8881.9129133312. The cubic root of 78888377 is about 428.8818561040.

The spelling of 78888377 in words is "seventy-eight million, eight hundred eighty-eight thousand, three hundred seventy-seven".