381493 has 4 divisors (see below), whose sum is σ = 436000. Its totient is φ = 326988.

The previous prime is 381487. The next prime is 381509. The reversal of 381493 is 394183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 394183 = 401 ⋅983.

It is a cyclic number.

It is not a de Polignac number, because 381493 - 2⁵ = 381461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381413) 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, 27243 + ... + 27256.

It is an arithmetic number, because the mean of its divisors is an integer number (109000).

2³⁸¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

381493 is a deficient number, since it is larger than the sum of its proper divisors (54507).

381493 is an equidigital number, since it uses as much as digits as its factorization.

381493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54506.

The product of its digits is 2592, while the sum is 28.

The square root of 381493 is about 617.6511960646. The cubic root of 381493 is about 72.5263004065.

The spelling of 381493 in words is "three hundred eighty-one thousand, four hundred ninety-three".