13837381 has 4 divisors (see below), whose sum is σ = 13869772. Its totient is φ = 13804992.

The previous prime is 13837361. The next prime is 13837387. The reversal of 13837381 is 18373831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6081156 + 7756225 = 2466^2 + 2785^2 .

It is a cyclic number.

It is not a de Polignac number, because 13837381 - 2⁵ = 13837349 is a prime.

It is a super-2 number, since 2×13837381² = 382946225878322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13837387) 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, 15546 + ... + 16411.

It is an arithmetic number, because the mean of its divisors is an integer number (3467443).

Almost surely, 2^13837381 is an apocalyptic number.

It is an amenable number.

13837381 is a deficient number, since it is larger than the sum of its proper divisors (32391).

13837381 is an equidigital number, since it uses as much as digits as its factorization.

13837381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32390.

The product of its digits is 12096, while the sum is 34.

The square root of 13837381 is about 3719.8630351130. The cubic root of 13837381 is about 240.0774113711.

The spelling of 13837381 in words is "thirteen million, eight hundred thirty-seven thousand, three hundred eighty-one".