381942755 has 4 divisors (see below), whose sum is σ = 458331312. Its totient is φ = 305554200.

The previous prime is 381942739. The next prime is 381942763. The reversal of 381942755 is 557249183.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 381942755 - 2⁴ = 381942739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38194271 + ... + 38194280.

It is an arithmetic number, because the mean of its divisors is an integer number (114582828).

Almost surely, 2^381942755 is an apocalyptic number.

381942755 is a deficient number, since it is larger than the sum of its proper divisors (76388557).

381942755 is an equidigital number, since it uses as much as digits as its factorization.

381942755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76388556.

The product of its digits is 302400, while the sum is 44.

The square root of 381942755 is about 19543.3557763246. The cubic root of 381942755 is about 725.5479044959.

The spelling of 381942755 in words is "three hundred eighty-one million, nine hundred forty-two thousand, seven hundred fifty-five".