13788779 has 2 divisors, whose sum is σ = 13788780. Its totient is φ = 13788778.

The previous prime is 13788773. The next prime is 13788781. The reversal of 13788779 is 97788731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13788779 - 2⁴ = 13788763 is a prime.

It is a Sophie Germain prime.

Together with 13788781, 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 (13788773) 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, 6894389 + 6894390.

It is an arithmetic number, because the mean of its divisors is an integer number (6894390).

Almost surely, 2^13788779 is an apocalyptic number.

13788779 is a deficient number, since it is larger than the sum of its proper divisors (1).

13788779 is an equidigital number, since it uses as much as digits as its factorization.

13788779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 50.

The square root of 13788779 is about 3713.3245212343. The cubic root of 13788779 is about 239.7960014201.

The spelling of 13788779 in words is "thirteen million, seven hundred eighty-eight thousand, seven hundred seventy-nine".