8318381 has 2 divisors, whose sum is σ = 8318382. Its totient is φ = 8318380.

The previous prime is 8318357. The next prime is 8318411. The reversal of 8318381 is 1838138.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6604900 + 1713481 = 2570^2 + 1309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8318381 is a prime.

It is a super-2 number, since 2×8318381² = 138390924922322, which contains 22 as substring.

It is a Chen prime.

It is equal to p₅₅₉₇₆₀ and since 8318381 and 559760 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8318281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4159190 + 4159191.

It is an arithmetic number, because the mean of its divisors is an integer number (4159191).

Almost surely, 2^8318381 is an apocalyptic number.

It is an amenable number.

8318381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8318381 is an equidigital number, since it uses as much as digits as its factorization.

8318381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 32.

The square root of 8318381 is about 2884.1603630866. The cubic root of 8318381 is about 202.6187364413.

The spelling of 8318381 in words is "eight million, three hundred eighteen thousand, three hundred eighty-one".