381662339 has 2 divisors, whose sum is σ = 381662340. Its totient is φ = 381662338.

The previous prime is 381662287. The next prime is 381662341. The reversal of 381662339 is 933266183.

It is a strong prime.

It is an emirp because it is prime and its reverse (933266183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381662339 - 2²⁰ = 380613763 is a prime.

It is a super-2 number, since 2×381662339² = 291332282021901842, which contains 22 as substring.

Together with 381662341, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 381662296 and 381662305.

It is not a weakly prime, because it can be changed into another prime (381662639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190831169 + 190831170.

It is an arithmetic number, because the mean of its divisors is an integer number (190831170).

Almost surely, 2^381662339 is an apocalyptic number.

381662339 is a deficient number, since it is larger than the sum of its proper divisors (1).

381662339 is an equidigital number, since it uses as much as digits as its factorization.

381662339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 41.

The square root of 381662339 is about 19536.1802561299. The cubic root of 381662339 is about 725.3702993007.

The spelling of 381662339 in words is "three hundred eighty-one million, six hundred sixty-two thousand, three hundred thirty-nine".