13168945 has 4 divisors (see below), whose sum is σ = 15802740. Its totient is φ = 10535152.

The previous prime is 13168943. The next prime is 13169021. The reversal of 13168945 is 54986131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54986131 = 2647 ⋅20773.

It can be written as a sum of positive squares in 2 ways, for example, as 4460544 + 8708401 = 2112^2 + 2951^2 .

It is a cyclic number.

It is not a de Polignac number, because 13168945 - 2¹ = 13168943 is a prime.

It is a super-2 number, since 2×13168945² = 346842224826050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13168943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316890 + ... + 1316899.

It is an arithmetic number, because the mean of its divisors is an integer number (3950685).

Almost surely, 2^13168945 is an apocalyptic number.

It is an amenable number.

13168945 is a deficient number, since it is larger than the sum of its proper divisors (2633795).

13168945 is an equidigital number, since it uses as much as digits as its factorization.

13168945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2633794.

The product of its digits is 25920, while the sum is 37.

The square root of 13168945 is about 3628.9041045473. The cubic root of 13168945 is about 236.1476680446.

The spelling of 13168945 in words is "thirteen million, one hundred sixty-eight thousand, nine hundred forty-five".