381728119 has 2 divisors, whose sum is σ = 381728120. Its totient is φ = 381728118.

The previous prime is 381728117. The next prime is 381728129. The reversal of 381728119 is 911827183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381728119 - 2¹ = 381728117 is a prime.

It is a super-2 number, since 2×381728119² = 291432713670556322, which contains 22 as substring.

Together with 381728117, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381728111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190864059 + 190864060.

It is an arithmetic number, because the mean of its divisors is an integer number (190864060).

Almost surely, 2^381728119 is an apocalyptic number.

381728119 is a deficient number, since it is larger than the sum of its proper divisors (1).

381728119 is an equidigital number, since it uses as much as digits as its factorization.

381728119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 40.

The square root of 381728119 is about 19537.8637266207. The cubic root of 381728119 is about 725.4119697447.

The spelling of 381728119 in words is "three hundred eighty-one million, seven hundred twenty-eight thousand, one hundred nineteen".