1338545185 has 4 divisors (see below), whose sum is σ = 1606254228. Its totient is φ = 1070836144.

The previous prime is 1338545183. The next prime is 1338545203. The reversal of 1338545185 is 5815458331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5815458331 = 43 ⋅135243217.

It can be written as a sum of positive squares in 2 ways, for example, as 695060496 + 643484689 = 26364^2 + 25367^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338545185 - 2¹ = 1338545183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338545183) 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 3 ways as a sum of consecutive naturals, for example, 133854514 + ... + 133854523.

It is an arithmetic number, because the mean of its divisors is an integer number (401563557).

Almost surely, 2^1338545185 is an apocalyptic number.

It is an amenable number.

1338545185 is a deficient number, since it is larger than the sum of its proper divisors (267709043).

1338545185 is an equidigital number, since it uses as much as digits as its factorization.

1338545185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267709042.

The product of its digits is 288000, while the sum is 43.

The square root of 1338545185 is about 36586.1337804365. The cubic root of 1338545185 is about 1102.0746480242.

The spelling of 1338545185 in words is "one billion, three hundred thirty-eight million, five hundred forty-five thousand, one hundred eighty-five".