13823979 has 8 divisors (see below), whose sum is σ = 19849872. Its totient is φ = 8507040.

The previous prime is 13823959. The next prime is 13823987. The reversal of 13823979 is 97932831.

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

It is not a de Polignac number, because 13823979 - 2⁵ = 13823947 is a prime.

It is a super-2 number, since 2×13823979² = 382204790784882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13823979.

It is not an unprimeable number, because it can be changed into a prime (13823959) 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 in 7 ways as a sum of consecutive naturals, for example, 177192 + ... + 177269.

It is an arithmetic number, because the mean of its divisors is an integer number (2481234).

Almost surely, 2^13823979 is an apocalyptic number.

13823979 is a deficient number, since it is larger than the sum of its proper divisors (6025893).

13823979 is a wasteful number, since it uses less digits than its factorization.

13823979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354477.

The product of its digits is 81648, while the sum is 42.

The square root of 13823979 is about 3718.0611883077. The cubic root of 13823979 is about 239.9998784722. Note that the first 3 decimals are identical.

The spelling of 13823979 in words is "thirteen million, eight hundred twenty-three thousand, nine hundred seventy-nine".