381783 has 4 divisors (see below), whose sum is σ = 509048. Its totient is φ = 254520.

The previous prime is 381761. The next prime is 381791. The reversal of 381783 is 387183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 387183 = 3 ⋅129061.

It is not a de Polignac number, because 381783 - 2⁸ = 381527 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381713) 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, 63628 + ... + 63633.

It is an arithmetic number, because the mean of its divisors is an integer number (127262).

2³⁸¹⁷⁸³ is an apocalyptic number.

381783 is a deficient number, since it is larger than the sum of its proper divisors (127265).

381783 is a wasteful number, since it uses less digits than its factorization.

381783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127264.

The product of its digits is 4032, while the sum is 30.

The square root of 381783 is about 617.8859117993. The cubic root of 381783 is about 72.5446732206.

The spelling of 381783 in words is "three hundred eighty-one thousand, seven hundred eighty-three".