1338717161 has 2 divisors, whose sum is σ = 1338717162. Its totient is φ = 1338717160.

The previous prime is 1338717157. The next prime is 1338717179. The reversal of 1338717161 is 1617178331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1338169561 + 547600 = 36581^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338717161 - 2² = 1338717157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1338717131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669358580 + 669358581.

It is an arithmetic number, because the mean of its divisors is an integer number (669358581).

Almost surely, 2^1338717161 is an apocalyptic number.

It is an amenable number.

1338717161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338717161 is an equidigital number, since it uses as much as digits as its factorization.

1338717161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 38.

The square root of 1338717161 is about 36588.4839942843. The cubic root of 1338717161 is about 1102.1218441083.

The spelling of 1338717161 in words is "one billion, three hundred thirty-eight million, seven hundred seventeen thousand, one hundred sixty-one".