8119381 has 4 divisors (see below), whose sum is σ = 8210700. Its totient is φ = 8028064.

The previous prime is 8119379. The next prime is 8119417. The reversal of 8119381 is 1839118.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1839118 = 2 ⋅919559.

It can be written as a sum of positive squares in 2 ways, for example, as 5716881 + 2402500 = 2391^2 + 1550^2 .

It is a cyclic number.

It is not a de Polignac number, because 8119381 - 2¹ = 8119379 is a prime.

It is a super-2 number, since 2×8119381² = 131848695646322, 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 (8119361) 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, 45526 + ... + 45703.

It is an arithmetic number, because the mean of its divisors is an integer number (2052675).

Almost surely, 2^8119381 is an apocalyptic number.

It is an amenable number.

8119381 is a deficient number, since it is larger than the sum of its proper divisors (91319).

8119381 is an equidigital number, since it uses as much as digits as its factorization.

8119381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91318.

The product of its digits is 1728, while the sum is 31.

The square root of 8119381 is about 2849.4527544776. The cubic root of 8119381 is about 200.9899337384.

The spelling of 8119381 in words is "eight million, one hundred nineteen thousand, three hundred eighty-one".