1338967705 has 4 divisors (see below), whose sum is σ = 1606761252. Its totient is φ = 1071174160.

The previous prime is 1338967697. The next prime is 1338967711. The reversal of 1338967705 is 5077698331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5077698331 = 211 ⋅24064921.

It can be written as a sum of positive squares in 2 ways, for example, as 203547289 + 1135420416 = 14267^2 + 33696^2 .

It is not a de Polignac number, because 1338967705 - 2³ = 1338967697 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133896766 + ... + 133896775.

It is an arithmetic number, because the mean of its divisors is an integer number (401690313).

Almost surely, 2^1338967705 is an apocalyptic number.

It is an amenable number.

1338967705 is a deficient number, since it is larger than the sum of its proper divisors (267793547).

1338967705 is an equidigital number, since it uses as much as digits as its factorization.

1338967705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267793546.

The product of its (nonzero) digits is 952560, while the sum is 49.

The square root of 1338967705 is about 36591.9076436307. The cubic root of 1338967705 is about 1102.1905947000.

The spelling of 1338967705 in words is "one billion, three hundred thirty-eight million, nine hundred sixty-seven thousand, seven hundred five".