13918709 has 8 divisors (see below), whose sum is σ = 16065408. Its totient is φ = 11811600.

The previous prime is 13918687. The next prime is 13918711. The reversal of 13918709 is 90781931.

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 13918709 - 2¹⁶ = 13853173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13918759) 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, 9137 + ... + 10550.

It is an arithmetic number, because the mean of its divisors is an integer number (2008176).

Almost surely, 2^13918709 is an apocalyptic number.

It is an amenable number.

13918709 is a deficient number, since it is larger than the sum of its proper divisors (2146699).

13918709 is a wasteful number, since it uses less digits than its factorization.

13918709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19795.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 13918709 is about 3730.7786050636. The cubic root of 13918709 is about 240.5468375805.

The spelling of 13918709 in words is "thirteen million, nine hundred eighteen thousand, seven hundred nine".