338881393 has 2 divisors, whose sum is σ = 338881394. Its totient is φ = 338881392.

The previous prime is 338881381. The next prime is 338881453. The reversal of 338881393 is 393188833.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273141729 + 65739664 = 16527^2 + 8108^2 .

It is a cyclic number.

It is not a de Polignac number, because 338881393 - 2¹³ = 338873201 is a prime.

It is a super-2 number, since 2×338881393² = 229681197043240898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (338881303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169440696 + 169440697.

It is an arithmetic number, because the mean of its divisors is an integer number (169440697).

Almost surely, 2^338881393 is an apocalyptic number.

It is an amenable number.

338881393 is a deficient number, since it is larger than the sum of its proper divisors (1).

338881393 is an equidigital number, since it uses as much as digits as its factorization.

338881393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 46.

The square root of 338881393 is about 18408.7314337518. The cubic root of 338881393 is about 697.1869369256.

The spelling of 338881393 in words is "three hundred thirty-eight million, eight hundred eighty-one thousand, three hundred ninety-three".