8947642859 has 2 divisors, whose sum is σ = 8947642860. Its totient is φ = 8947642858.

The previous prime is 8947642843. The next prime is 8947642927. The reversal of 8947642859 is 9582467498.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8947642859 - 2⁴ = 8947642843 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8947642819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4473821429 + 4473821430.

It is an arithmetic number, because the mean of its divisors is an integer number (4473821430).

Almost surely, 2^8947642859 is an apocalyptic number.

8947642859 is a deficient number, since it is larger than the sum of its proper divisors (1).

8947642859 is an equidigital number, since it uses as much as digits as its factorization.

8947642859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34836480, while the sum is 62.

The square root of 8947642859 is about 94591.9809444754. The cubic root of 8947642859 is about 2076.0423743459.

The spelling of 8947642859 in words is "eight billion, nine hundred forty-seven million, six hundred forty-two thousand, eight hundred fifty-nine".