13920317 has 4 divisors (see below), whose sum is σ = 13927836. Its totient is φ = 13912800.

The previous prime is 13920299. The next prime is 13920323. The reversal of 13920317 is 71302931.

13920317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71302931 = 7 ⋅10186133.

It can be written as a sum of positive squares in 2 ways, for example, as 7873636 + 6046681 = 2806^2 + 2459^2 .

It is a cyclic number.

It is not a de Polignac number, because 13920317 - 2⁸ = 13920061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13920337) 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, 1193 + ... + 5409.

It is an arithmetic number, because the mean of its divisors is an integer number (3481959).

Almost surely, 2^13920317 is an apocalyptic number.

It is an amenable number.

13920317 is a deficient number, since it is larger than the sum of its proper divisors (7519).

13920317 is an equidigital number, since it uses as much as digits as its factorization.

13920317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7518.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 13920317 is about 3730.9941034529. The cubic root of 13920317 is about 240.5561005186.

The spelling of 13920317 in words is "thirteen million, nine hundred twenty thousand, three hundred seventeen".