381853 has 2 divisors, whose sum is σ = 381854. Its totient is φ = 381852.

The previous prime is 381841. The next prime is 381859. The reversal of 381853 is 358183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375769 + 6084 = 613^2 + 78^2 .

It is a cyclic number.

It is not a de Polignac number, because 381853 - 2¹³ = 373661 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190926 + 190927.

It is an arithmetic number, because the mean of its divisors is an integer number (190927).

2³⁸¹⁸⁵³ is an apocalyptic number.

It is an amenable number.

381853 is a deficient number, since it is larger than the sum of its proper divisors (1).

381853 is an equidigital number, since it uses as much as digits as its factorization.

381853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 381853 is about 617.9425539644. The cubic root of 381853 is about 72.5491066437.

It can be divided in two parts, 38 and 1853, that added together give a triangular number (1891 = T₆₁).

The spelling of 381853 in words is "three hundred eighty-one thousand, eight hundred fifty-three".