13697381 has 8 divisors (see below), whose sum is σ = 14380800. Its totient is φ = 13029120.

The previous prime is 13697377. The next prime is 13697389. The reversal of 13697381 is 18379631.

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

It is a cyclic number.

It is not a de Polignac number, because 13697381 - 2² = 13697377 is a prime.

It is a super-2 number, since 2×13697381² = 375236492518322, 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 (13697389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1916 + ... + 5573.

It is an arithmetic number, because the mean of its divisors is an integer number (1797600).

Almost surely, 2^13697381 is an apocalyptic number.

It is an amenable number.

13697381 is a deficient number, since it is larger than the sum of its proper divisors (683419).

13697381 is an equidigital number, since it uses as much as digits as its factorization.

13697381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7579.

The product of its digits is 27216, while the sum is 38.

The square root of 13697381 is about 3700.9972980266. The cubic root of 13697381 is about 239.2650025332.

The spelling of 13697381 in words is "thirteen million, six hundred ninety-seven thousand, three hundred eighty-one".