381487 has 2 divisors, whose sum is σ = 381488. Its totient is φ = 381486.

The previous prime is 381481. The next prime is 381509. The reversal of 381487 is 784183.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (784183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381487 - 2¹¹ = 379439 is a prime.

It is a Chen prime.

381487 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190743 + 190744.

It is an arithmetic number, because the mean of its divisors is an integer number (190744).

2³⁸¹⁴⁸⁷ is an apocalyptic number.

381487 is a deficient number, since it is larger than the sum of its proper divisors (1).

381487 is an equidigital number, since it uses as much as digits as its factorization.

381487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 31.

The square root of 381487 is about 617.6463389352. The cubic root of 381487 is about 72.5259201810.

It can be divided in two parts, 381 and 487, that added together give a palindrome (868).

The spelling of 381487 in words is "three hundred eighty-one thousand, four hundred eighty-seven".