13691393 has 8 divisors (see below), whose sum is σ = 14250600. Its totient is φ = 13138048.

The previous prime is 13691387. The next prime is 13691401. The reversal of 13691393 is 39319631.

It can be written as a sum of positive squares in 4 ways, for example, as 8952064 + 4739329 = 2992^2 + 2177^2 .

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 13691393 - 2¹⁴ = 13675009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13691323) 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, 3653 + ... + 6381.

It is an arithmetic number, because the mean of its divisors is an integer number (1781325).

Almost surely, 2^13691393 is an apocalyptic number.

It is an amenable number.

13691393 is a deficient number, since it is larger than the sum of its proper divisors (559207).

13691393 is a wasteful number, since it uses less digits than its factorization.

13691393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931.

The product of its digits is 13122, while the sum is 35.

The square root of 13691393 is about 3700.1882384549. The cubic root of 13691393 is about 239.2301314470.

The spelling of 13691393 in words is "thirteen million, six hundred ninety-one thousand, three hundred ninety-three".