13191938 has 8 divisors (see below), whose sum is σ = 19807500. Its totient is φ = 6589440.

The previous prime is 13191929. The next prime is 13191953. The reversal of 13191938 is 83919131.

It can be written as a sum of positive squares in 2 ways, for example, as 12369289 + 822649 = 3517^2 + 907^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 13191898 and 13191907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143 + ... + 5138.

Almost surely, 2^13191938 is an apocalyptic number.

13191938 is a deficient number, since it is larger than the sum of its proper divisors (6615562).

13191938 is a wasteful number, since it uses less digits than its factorization.

13191938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6532.

The product of its digits is 5832, while the sum is 35.

The square root of 13191938 is about 3632.0707592226. The cubic root of 13191938 is about 236.2850262076.

The spelling of 13191938 in words is "thirteen million, one hundred ninety-one thousand, nine hundred thirty-eight".