381623 has 4 divisors (see below), whose sum is σ = 416328. Its totient is φ = 346920.

The previous prime is 381607. The next prime is 381629. The reversal of 381623 is 326183.

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

It is a cyclic number.

It is not a de Polignac number, because 381623 - 2⁴ = 381607 is a prime.

It is a super-2 number, since 2×381623² = 291272228258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381629) 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, 17336 + ... + 17357.

It is an arithmetic number, because the mean of its divisors is an integer number (104082).

2³⁸¹⁶²³ is an apocalyptic number.

381623 is a deficient number, since it is larger than the sum of its proper divisors (34705).

381623 is a wasteful number, since it uses less digits than its factorization.

381623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34704.

The product of its digits is 864, while the sum is 23.

The square root of 381623 is about 617.7564244911. The cubic root of 381623 is about 72.5345376466.

It can be divided in two parts, 38 and 1623, that added together give a palindrome (1661).

The spelling of 381623 in words is "three hundred eighty-one thousand, six hundred twenty-three".