13721938 has 8 divisors (see below), whose sum is σ = 21477888. Its totient is φ = 6562644.

The previous prime is 13721927. The next prime is 13721987. The reversal of 13721938 is 83912731.

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

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, 149106 + ... + 149197.

It is an arithmetic number, because the mean of its divisors is an integer number (2684736).

Almost surely, 2^13721938 is an apocalyptic number.

13721938 is a deficient number, since it is larger than the sum of its proper divisors (7755950).

13721938 is a wasteful number, since it uses less digits than its factorization.

13721938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298328.

The product of its digits is 9072, while the sum is 34.

The square root of 13721938 is about 3704.3134316631. The cubic root of 13721938 is about 239.4079038863.

The spelling of 13721938 in words is "thirteen million, seven hundred twenty-one thousand, nine hundred thirty-eight".