1338933217 has 2 divisors, whose sum is σ = 1338933218. Its totient is φ = 1338933216.

The previous prime is 1338933191. The next prime is 1338933241. The reversal of 1338933217 is 7123398331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1302921216 + 36012001 = 36096^2 + 6001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1338933217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1338933217.

It is not a weakly prime, because it can be changed into another prime (1338934217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669466608 + 669466609.

It is an arithmetic number, because the mean of its divisors is an integer number (669466609).

Almost surely, 2^1338933217 is an apocalyptic number.

It is an amenable number.

1338933217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338933217 is an equidigital number, since it uses as much as digits as its factorization.

1338933217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 1338933217 is about 36591.4363888602. The cubic root of 1338933217 is about 1102.1811315204.

The spelling of 1338933217 in words is "one billion, three hundred thirty-eight million, nine hundred thirty-three thousand, two hundred seventeen".