84942859 has 2 divisors, whose sum is σ = 84942860. Its totient is φ = 84942858.

The previous prime is 84942853. The next prime is 84942961. The reversal of 84942859 is 95824948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84942859 - 2²³ = 76554251 is a prime.

It is not a weakly prime, because it can be changed into another prime (84942853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42471429 + 42471430.

It is an arithmetic number, because the mean of its divisors is an integer number (42471430).

Almost surely, 2^84942859 is an apocalyptic number.

84942859 is a deficient number, since it is larger than the sum of its proper divisors (1).

84942859 is an equidigital number, since it uses as much as digits as its factorization.

84942859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 49.

The square root of 84942859 is about 9216.4450304876. The cubic root of 84942859 is about 439.5844199360.

The spelling of 84942859 in words is "eighty-four million, nine hundred forty-two thousand, eight hundred fifty-nine".