338881381 has 2 divisors, whose sum is σ = 338881382. Its totient is φ = 338881380.

The previous prime is 338881357. The next prime is 338881393. The reversal of 338881381 is 183188833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332332900 + 6548481 = 18230^2 + 2559^2 .

It is a cyclic number.

It is not a de Polignac number, because 338881381 - 2¹⁹ = 338357093 is a prime.

It is a super-2 number, since 2×338881381² = 229681180776934322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (338881331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169440690 + 169440691.

It is an arithmetic number, because the mean of its divisors is an integer number (169440691).

Almost surely, 2^338881381 is an apocalyptic number.

It is an amenable number.

338881381 is a deficient number, since it is larger than the sum of its proper divisors (1).

338881381 is an equidigital number, since it uses as much as digits as its factorization.

338881381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 43.

The square root of 338881381 is about 18408.7311078195. The cubic root of 338881381 is about 697.1869286963.

The spelling of 338881381 in words is "three hundred thirty-eight million, eight hundred eighty-one thousand, three hundred eighty-one".