8138387 has 2 divisors, whose sum is σ = 8138388. Its totient is φ = 8138386.

The previous prime is 8138371. The next prime is 8138413. The reversal of 8138387 is 7838318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8138387 - 2⁴ = 8138371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8138387.

It is not a weakly prime, because it can be changed into another prime (8138687) 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 as a sum of consecutive naturals, namely, 4069193 + 4069194.

It is an arithmetic number, because the mean of its divisors is an integer number (4069194).

Almost surely, 2^8138387 is an apocalyptic number.

8138387 is a deficient number, since it is larger than the sum of its proper divisors (1).

8138387 is an equidigital number, since it uses as much as digits as its factorization.

8138387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 8138387 is about 2852.7858314286. The cubic root of 8138387 is about 201.1466385372.

The spelling of 8138387 in words is "eight million, one hundred thirty-eight thousand, three hundred eighty-seven".