381489 has 4 divisors (see below), whose sum is σ = 508656. Its totient is φ = 254324.

The previous prime is 381487. The next prime is 381509. The reversal of 381489 is 984183.

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: 984183 = 3 ⋅328061.

It is a cyclic number.

It is not a de Polignac number, because 381489 - 2¹ = 381487 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381489.

It is not an unprimeable number, because it can be changed into a prime (381481) 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, 63579 + ... + 63584.

It is an arithmetic number, because the mean of its divisors is an integer number (127164).

2³⁸¹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

381489 is a deficient number, since it is larger than the sum of its proper divisors (127167).

381489 is a wasteful number, since it uses less digits than its factorization.

381489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127166.

The product of its digits is 6912, while the sum is 33.

The square root of 381489 is about 617.6479579825. The cubic root of 381489 is about 72.5260469233.

The spelling of 381489 in words is "three hundred eighty-one thousand, four hundred eighty-nine".