13779899 has 8 divisors (see below), whose sum is σ = 15771648. Its totient is φ = 11793960.

The previous prime is 13779869. The next prime is 13779907. The reversal of 13779899 is 99897731.

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 13779899 - 2⁸ = 13779643 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 13779899.

It is not an unprimeable number, because it can be changed into a prime (13779869) 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, 6704 + ... + 8514.

It is an arithmetic number, because the mean of its divisors is an integer number (1971456).

Almost surely, 2^13779899 is an apocalyptic number.

13779899 is a deficient number, since it is larger than the sum of its proper divisors (1991749).

13779899 is a wasteful number, since it uses less digits than its factorization.

13779899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905.

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

The square root of 13779899 is about 3712.1286346246. The cubic root of 13779899 is about 239.7445140049.

The spelling of 13779899 in words is "thirteen million, seven hundred seventy-nine thousand, eight hundred ninety-nine".