13798979 has 4 divisors (see below), whose sum is σ = 14032920. Its totient is φ = 13565040.

The previous prime is 13798969. The next prime is 13798987. The reversal of 13798979 is 97989731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13798979 - 2⁴ = 13798963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13798979.

It is not an unprimeable number, because it can be changed into a prime (13798909) 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 3 ways as a sum of consecutive naturals, for example, 116882 + ... + 116999.

It is an arithmetic number, because the mean of its divisors is an integer number (3508230).

Almost surely, 2^13798979 is an apocalyptic number.

13798979 is a deficient number, since it is larger than the sum of its proper divisors (233941).

13798979 is an equidigital number, since it uses as much as digits as its factorization.

13798979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233940.

The product of its digits is 857304, while the sum is 53.

The square root of 13798979 is about 3714.6976996789. The cubic root of 13798979 is about 239.8551150988.

The spelling of 13798979 in words is "thirteen million, seven hundred ninety-eight thousand, nine hundred seventy-nine".