13929779 has 2 divisors, whose sum is σ = 13929780. Its totient is φ = 13929778.

The previous prime is 13929767. The next prime is 13929781. The reversal of 13929779 is 97792931.

13929779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (97792931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13929779 - 2⁸ = 13929523 is a prime.

Together with 13929781, 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 (13929739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6964889 + 6964890.

It is an arithmetic number, because the mean of its divisors is an integer number (6964890).

Almost surely, 2^13929779 is an apocalyptic number.

13929779 is a deficient number, since it is larger than the sum of its proper divisors (1).

13929779 is an equidigital number, since it uses as much as digits as its factorization.

13929779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 214326, while the sum is 47.

The square root of 13929779 is about 3732.2619147107. The cubic root of 13929779 is about 240.6105922447.

The spelling of 13929779 in words is "thirteen million, nine hundred twenty-nine thousand, seven hundred seventy-nine".