338670389 has 2 divisors, whose sum is σ = 338670390. Its totient is φ = 338670388.

The previous prime is 338670349. The next prime is 338670457. The reversal of 338670389 is 983076833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308880625 + 29789764 = 17575^2 + 5458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-338670389 is a prime.

It is a super-2 number, since 2×338670389² = 229395264770822642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (338670329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169335194 + 169335195.

It is an arithmetic number, because the mean of its divisors is an integer number (169335195).

Almost surely, 2^338670389 is an apocalyptic number.

It is an amenable number.

338670389 is a deficient number, since it is larger than the sum of its proper divisors (1).

338670389 is an equidigital number, since it uses as much as digits as its factorization.

338670389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 338670389 is about 18402.9994566103. Note that the first 3 decimals coincide. The cubic root of 338670389 is about 697.0422060763.

The spelling of 338670389 in words is "three hundred thirty-eight million, six hundred seventy thousand, three hundred eighty-nine".