8381219387 has 2 divisors, whose sum is σ = 8381219388. Its totient is φ = 8381219386.

The previous prime is 8381219383. The next prime is 8381219449. The reversal of 8381219387 is 7839121838.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8381219387 - 2² = 8381219383 is a prime.

It is not a weakly prime, because it can be changed into another prime (8381219383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4190609693 + 4190609694.

It is an arithmetic number, because the mean of its divisors is an integer number (4190609694).

Almost surely, 2^8381219387 is an apocalyptic number.

8381219387 is a deficient number, since it is larger than the sum of its proper divisors (1).

8381219387 is an equidigital number, since it uses as much as digits as its factorization.

8381219387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 50.

The square root of 8381219387 is about 91548.9999235382. Note that the first 4 decimals coincide. The cubic root of 8381219387 is about 2031.2766191611.

The spelling of 8381219387 in words is "eight billion, three hundred eighty-one million, two hundred nineteen thousand, three hundred eighty-seven".