13016945 has 4 divisors (see below), whose sum is σ = 15620340. Its totient is φ = 10413552.

The previous prime is 13016929. The next prime is 13016953. The reversal of 13016945 is 54961031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6806881 + 6210064 = 2609^2 + 2492^2 .

It is a cyclic number.

It is not a de Polignac number, because 13016945 - 2⁴ = 13016929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1301690 + ... + 1301699.

It is an arithmetic number, because the mean of its divisors is an integer number (3905085).

Almost surely, 2^13016945 is an apocalyptic number.

It is an amenable number.

13016945 is a deficient number, since it is larger than the sum of its proper divisors (2603395).

13016945 is an equidigital number, since it uses as much as digits as its factorization.

13016945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603394.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 13016945 is about 3607.9003589345. The cubic root of 13016945 is about 235.2355868936.

Adding to 13016945 its reverse (54961031), we get a palindrome (67977976).

The spelling of 13016945 in words is "thirteen million, sixteen thousand, nine hundred forty-five".