381933111 has 8 divisors (see below), whose sum is σ = 581993344. Its totient is φ = 218247480.

The previous prime is 381933077. The next prime is 381933119. The reversal of 381933111 is 111339183.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381933111 - 2⁶ = 381933047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381933119) 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 in 7 ways as a sum of consecutive naturals, for example, 9093625 + ... + 9093666.

It is an arithmetic number, because the mean of its divisors is an integer number (72749168).

Almost surely, 2^381933111 is an apocalyptic number.

381933111 is a deficient number, since it is larger than the sum of its proper divisors (200060233).

381933111 is a wasteful number, since it uses less digits than its factorization.

381933111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18187301.

The product of its digits is 1944, while the sum is 30.

The square root of 381933111 is about 19543.1090412964. The cubic root of 381933111 is about 725.5417977842.

The spelling of 381933111 in words is "three hundred eighty-one million, nine hundred thirty-three thousand, one hundred eleven".