338442289 has 2 divisors, whose sum is σ = 338442290. Its totient is φ = 338442288.

The previous prime is 338442271. The next prime is 338442311. The reversal of 338442289 is 982244833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169442289 + 169000000 = 13017^2 + 13000^2 .

It is an emirp because it is prime and its reverse (982244833) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 338442289 - 2²¹ = 336345137 is a prime.

It is a super-2 number, since 2×338442289² = 229086365967119042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (338442229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169221144 + 169221145.

It is an arithmetic number, because the mean of its divisors is an integer number (169221145).

Almost surely, 2^338442289 is an apocalyptic number.

It is an amenable number.

338442289 is a deficient number, since it is larger than the sum of its proper divisors (1).

338442289 is an equidigital number, since it uses as much as digits as its factorization.

338442289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 43.

The square root of 338442289 is about 18396.8010534440. The cubic root of 338442289 is about 696.8856811865.

The spelling of 338442289 in words is "three hundred thirty-eight million, four hundred forty-two thousand, two hundred eighty-nine".