13187938 has 8 divisors (see below), whose sum is σ = 20823120. Its totient is φ = 6246900.

The previous prime is 13187921. The next prime is 13187939. The reversal of 13187938 is 83978131.

13187938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-3 number, since 3×13187938³ (a number of 22 digits) contains 333 as substring.

It is a zygodrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 13187938.

It is not an unprimeable number, because it can be changed into a prime (13187939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173488 + ... + 173563.

It is an arithmetic number, because the mean of its divisors is an integer number (2602890).

Almost surely, 2^13187938 is an apocalyptic number.

13187938 is a deficient number, since it is larger than the sum of its proper divisors (7635182).

13187938 is a wasteful number, since it uses less digits than its factorization.

13187938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347072.

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

The square root of 13187938 is about 3631.5200674098. The cubic root of 13187938 is about 236.2611420330.

The spelling of 13187938 in words is "thirteen million, one hundred eighty-seven thousand, nine hundred thirty-eight".