381831723 has 48 divisors (see below), whose sum is σ = 684343296. Its totient is φ = 199765440.

The previous prime is 381831707. The next prime is 381831731. The reversal of 381831723 is 327138183.

It is not a de Polignac number, because 381831723 - 2⁴ = 381831707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381831773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102178 + ... + 105848.

It is an arithmetic number, because the mean of its divisors is an integer number (14257152).

Almost surely, 2^381831723 is an apocalyptic number.

381831723 is a deficient number, since it is larger than the sum of its proper divisors (302511573).

381831723 is a wasteful number, since it uses less digits than its factorization.

381831723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3824 (or 3821 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 381831723 is about 19540.5149113323. The cubic root of 381831723 is about 725.4775913042.

The spelling of 381831723 in words is "three hundred eighty-one million, eight hundred thirty-one thousand, seven hundred twenty-three".