381923 has 4 divisors (see below), whose sum is σ = 383160. Its totient is φ = 380688.

The previous prime is 381917. The next prime is 381937. The reversal of 381923 is 329183.

It is a Cunningham number, because it is equal to 618²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 329183 = 53 ⋅6211.

It is a cyclic number.

It is not a de Polignac number, because 381923 - 2⁶ = 381859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381892 and 381901.

It is not an unprimeable number, because it can be changed into a prime (381943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308 + ... + 926.

It is an arithmetic number, because the mean of its divisors is an integer number (95790).

2³⁸¹⁹²³ is an apocalyptic number.

381923 is a deficient number, since it is larger than the sum of its proper divisors (1237).

381923 is an equidigital number, since it uses as much as digits as its factorization.

381923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its digits is 1296, while the sum is 26.

The square root of 381923 is about 617.9991909380. Note that the first 3 decimals coincide. The cubic root of 381923 is about 72.5535395251.

The spelling of 381923 in words is "three hundred eighty-one thousand, nine hundred twenty-three".