8387149 has 2 divisors, whose sum is σ = 8387150. Its totient is φ = 8387148.

The previous prime is 8387147. The next prime is 8387153. The reversal of 8387149 is 9417838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8305924 + 81225 = 2882^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 8387149 - 2¹ = 8387147 is a prime.

Together with 8387147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8387147) 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, 4193574 + 4193575.

It is an arithmetic number, because the mean of its divisors is an integer number (4193575).

Almost surely, 2^8387149 is an apocalyptic number.

It is an amenable number.

8387149 is a deficient number, since it is larger than the sum of its proper divisors (1).

8387149 is an equidigital number, since it uses as much as digits as its factorization.

8387149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 8387149 is about 2896.0574925232. The cubic root of 8387149 is about 203.1755540915.

The spelling of 8387149 in words is "eight million, three hundred eighty-seven thousand, one hundred forty-nine".