13319945 has 8 divisors (see below), whose sum is σ = 16203336. Its totient is φ = 10509696.

The previous prime is 13319939. The next prime is 13319947. The reversal of 13319945 is 54991331.

It can be written as a sum of positive squares in 4 ways, for example, as 41209 + 13278736 = 203^2 + 3644^2 .

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 13319945 - 2⁶ = 13319881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13319947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17882 + ... + 18611.

It is an arithmetic number, because the mean of its divisors is an integer number (2025417).

Almost surely, 2^13319945 is an apocalyptic number.

It is an amenable number.

13319945 is a deficient number, since it is larger than the sum of its proper divisors (2883391).

13319945 is an equidigital number, since it uses as much as digits as its factorization.

13319945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36571.

The product of its digits is 14580, while the sum is 35.

The square root of 13319945 is about 3649.6499832176. The cubic root of 13319945 is about 237.0468255974.

The spelling of 13319945 in words is "thirteen million, three hundred nineteen thousand, nine hundred forty-five".