13928779 has 8 divisors (see below), whose sum is σ = 14469120. Its totient is φ = 13398696.

The previous prime is 13928753. The next prime is 13928791. The reversal of 13928779 is 97782931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13928779 - 2¹³ = 13920587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13920779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262 + ... + 5284.

It is an arithmetic number, because the mean of its divisors is an integer number (1808640).

Almost surely, 2^13928779 is an apocalyptic number.

13928779 is a deficient number, since it is larger than the sum of its proper divisors (540341).

13928779 is an equidigital number, since it uses as much as digits as its factorization.

13928779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129.

The product of its digits is 190512, while the sum is 46.

The square root of 13928779 is about 3732.1279452880. The cubic root of 13928779 is about 240.6048344038.

The spelling of 13928779 in words is "thirteen million, nine hundred twenty-eight thousand, seven hundred seventy-nine".