13943317 has 4 divisors (see below), whose sum is σ = 13951116. Its totient is φ = 13935520.

The previous prime is 13943299. The next prime is 13943323. The reversal of 13943317 is 71334931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7623121 + 6320196 = 2761^2 + 2514^2 .

It is a cyclic number.

It is not a de Polignac number, because 13943317 - 2¹⁵ = 13910549 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13943357) 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, 267 + ... + 5287.

It is an arithmetic number, because the mean of its divisors is an integer number (3487779).

Almost surely, 2^13943317 is an apocalyptic number.

It is an amenable number.

13943317 is a deficient number, since it is larger than the sum of its proper divisors (7799).

13943317 is an equidigital number, since it uses as much as digits as its factorization.

13943317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7798.

The product of its digits is 6804, while the sum is 31.

The square root of 13943317 is about 3734.0751197586. The cubic root of 13943317 is about 240.6885147901.

The spelling of 13943317 in words is "thirteen million, nine hundred forty-three thousand, three hundred seventeen".