8581379 has 4 divisors (see below), whose sum is σ = 9086184. Its totient is φ = 8076576.

The previous prime is 8581367. The next prime is 8581399. The reversal of 8581379 is 9731858.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9731858 = 2 ⋅4865929.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8581379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8581399) 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, 252377 + ... + 252410.

It is an arithmetic number, because the mean of its divisors is an integer number (2271546).

Almost surely, 2^8581379 is an apocalyptic number.

8581379 is a deficient number, since it is larger than the sum of its proper divisors (504805).

8581379 is a wasteful number, since it uses less digits than its factorization.

8581379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504804.

The product of its digits is 60480, while the sum is 41.

The square root of 8581379 is about 2929.3990851367. The cubic root of 8581379 is about 204.7319836773.

The spelling of 8581379 in words is "eight million, five hundred eighty-one thousand, three hundred seventy-nine".