13938718 has 4 divisors (see below), whose sum is σ = 20908080. Its totient is φ = 6969358.

The previous prime is 13938697. The next prime is 13938731. The reversal of 13938718 is 81783931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81783931 = 137 ⋅596963.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3484678 + ... + 3484681.

It is an arithmetic number, because the mean of its divisors is an integer number (5227020).

Almost surely, 2^13938718 is an apocalyptic number.

13938718 is a deficient number, since it is larger than the sum of its proper divisors (6969362).

13938718 is an equidigital number, since it uses as much as digits as its factorization.

13938718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6969361.

The product of its digits is 36288, while the sum is 40.

The square root of 13938718 is about 3733.4592538288. The cubic root of 13938718 is about 240.6620493466.

The spelling of 13938718 in words is "thirteen million, nine hundred thirty-eight thousand, seven hundred eighteen".