8206381 has 4 divisors (see below), whose sum is σ = 8229600. Its totient is φ = 8183164.

The previous prime is 8206343. The next prime is 8206403. The reversal of 8206381 is 1836028.

It is the 1170-th star number.

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.

It is a cyclic number.

It is not a de Polignac number, because 8206381 - 2¹⁹ = 7682093 is a prime.

It is a super-2 number, since 2×8206381² = 134689378234322, which contains 22 as substring.

It is a Duffinian number.

8206381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8206181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11071 + ... + 11788.

It is an arithmetic number, because the mean of its divisors is an integer number (2057400).

Almost surely, 2^8206381 is an apocalyptic number.

It is an amenable number.

8206381 is a deficient number, since it is larger than the sum of its proper divisors (23219).

8206381 is a wasteful number, since it uses less digits than its factorization.

8206381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23218.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 8206381 is about 2864.6781669151. The cubic root of 8206381 is about 201.7052607722.

The spelling of 8206381 in words is "eight million, two hundred six thousand, three hundred eighty-one".