338845391 has 2 divisors, whose sum is σ = 338845392. Its totient is φ = 338845390.

The previous prime is 338845369. The next prime is 338845399. The reversal of 338845391 is 193548833.

It is a strong prime.

It is an emirp because it is prime and its reverse (193548833) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 338845391 - 2⁶ = 338845327 is a prime.

It is a super-2 number, since 2×338845391² = 229632398003885762, 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 (338845399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169422695 + 169422696.

It is an arithmetic number, because the mean of its divisors is an integer number (169422696).

Almost surely, 2^338845391 is an apocalyptic number.

338845391 is a deficient number, since it is larger than the sum of its proper divisors (1).

338845391 is an equidigital number, since it uses as much as digits as its factorization.

338845391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 338845391 is about 18407.7535565859. The cubic root of 338845391 is about 697.1622468584.

The spelling of 338845391 in words is "three hundred thirty-eight million, eight hundred forty-five thousand, three hundred ninety-one".