13973138 has 4 divisors (see below), whose sum is σ = 20959710. Its totient is φ = 6986568.

The previous prime is 13973131. The next prime is 13973171. The reversal of 13973138 is 83137931.

13973138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 9102289 + 4870849 = 3017^2 + 2207^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13973098 and 13973107.

It is not an unprimeable number, because it can be changed into a prime (13973131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3493283 + ... + 3493286.

Almost surely, 2^13973138 is an apocalyptic number.

13973138 is a deficient number, since it is larger than the sum of its proper divisors (6986572).

13973138 is an equidigital number, since it uses as much as digits as its factorization.

13973138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6986571.

The product of its digits is 13608, while the sum is 35.

The square root of 13973138 is about 3738.0660775326. The cubic root of 13973138 is about 240.8599819119.

The spelling of 13973138 in words is "thirteen million, nine hundred seventy-three thousand, one hundred thirty-eight".