1338934217 has 2 divisors, whose sum is σ = 1338934218. Its totient is φ = 1338934216.

The previous prime is 1338934187. The next prime is 1338934273. The reversal of 1338934217 is 7124398331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1194670096 + 144264121 = 34564^2 + 12011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338934217 - 2⁶ = 1338934153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1338934717) by changing a digit.

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 as a sum of consecutive naturals, namely, 669467108 + 669467109.

It is an arithmetic number, because the mean of its divisors is an integer number (669467109).

Almost surely, 2^1338934217 is an apocalyptic number.

It is an amenable number.

1338934217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338934217 is an equidigital number, since it uses as much as digits as its factorization.

1338934217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 1338934217 is about 36591.4500532570. The cubic root of 1338934217 is about 1102.1814059132.

The spelling of 1338934217 in words is "one billion, three hundred thirty-eight million, nine hundred thirty-four thousand, two hundred seventeen".