13199979 has 8 divisors (see below), whose sum is σ = 18953872. Its totient is φ = 8123040.

The previous prime is 13199957. The next prime is 13199981. The reversal of 13199979 is 97999131.

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

It is not a de Polignac number, because 13199979 - 2⁹ = 13199467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13199929) 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 in 7 ways as a sum of consecutive naturals, for example, 169192 + ... + 169269.

It is an arithmetic number, because the mean of its divisors is an integer number (2369234).

Almost surely, 2^13199979 is an apocalyptic number.

13199979 is a deficient number, since it is larger than the sum of its proper divisors (5753893).

13199979 is a wasteful number, since it uses less digits than its factorization.

13199979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338477.

The product of its digits is 137781, while the sum is 48.

The square root of 13199979 is about 3633.1775348860. The cubic root of 13199979 is about 236.3330247652. Note that the first 3 decimals are identical.

The spelling of 13199979 in words is "thirteen million, one hundred ninety-nine thousand, nine hundred seventy-nine".