8445872387 has 2 divisors, whose sum is σ = 8445872388. Its totient is φ = 8445872386.

The previous prime is 8445872371. The next prime is 8445872423. The reversal of 8445872387 is 7832785448.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8445872387 - 2⁴ = 8445872371 is a prime.

It is not a weakly prime, because it can be changed into another prime (8445872287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4222936193 + 4222936194.

It is an arithmetic number, because the mean of its divisors is an integer number (4222936194).

Almost surely, 2^8445872387 is an apocalyptic number.

8445872387 is a deficient number, since it is larger than the sum of its proper divisors (1).

8445872387 is an equidigital number, since it uses as much as digits as its factorization.

8445872387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12042240, while the sum is 56.

The square root of 8445872387 is about 91901.4275569210. The cubic root of 8445872387 is about 2036.4863573938.

The spelling of 8445872387 in words is "eight billion, four hundred forty-five million, eight hundred seventy-two thousand, three hundred eighty-seven".