13916779 has 2 divisors, whose sum is σ = 13916780. Its totient is φ = 13916778.

The previous prime is 13916767. The next prime is 13916783. The reversal of 13916779 is 97761931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13916779 - 2⁹ = 13916267 is a prime.

It is not a weakly prime, because it can be changed into another prime (13916729) 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, 6958389 + 6958390.

It is an arithmetic number, because the mean of its divisors is an integer number (6958390).

Almost surely, 2^13916779 is an apocalyptic number.

13916779 is a deficient number, since it is larger than the sum of its proper divisors (1).

13916779 is an equidigital number, since it uses as much as digits as its factorization.

13916779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 43.

The square root of 13916779 is about 3730.5199369525. The cubic root of 13916779 is about 240.5357188085.

The spelling of 13916779 in words is "thirteen million, nine hundred sixteen thousand, seven hundred seventy-nine".