381619 has 4 divisors (see below), whose sum is σ = 436144. Its totient is φ = 327096.

The previous prime is 381607. The next prime is 381629. The reversal of 381619 is 916183.

It is a happy number.

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

It is not a de Polignac number, because 381619 - 2¹¹ = 379571 is a prime.

It is a super-2 number, since 2×381619² = 291266122322, which contains 22 as substring.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27252 + ... + 27265.

It is an arithmetic number, because the mean of its divisors is an integer number (109036).

2³⁸¹⁶¹⁹ is an apocalyptic number.

381619 is a deficient number, since it is larger than the sum of its proper divisors (54525).

381619 is an equidigital number, since it uses as much as digits as its factorization.

381619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54524.

The product of its digits is 1296, while the sum is 28.

The square root of 381619 is about 617.7531869606. The cubic root of 381619 is about 72.5342842209.

It can be divided in two parts, 381 and 619, that added together give a cube (1000 = 10³).

The spelling of 381619 in words is "three hundred eighty-one thousand, six hundred nineteen".