849879859 has 2 divisors, whose sum is σ = 849879860. Its totient is φ = 849879858.

The previous prime is 849879851. The next prime is 849879913. The reversal of 849879859 is 958978948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 849879859 - 2³ = 849879851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 849879794 and 849879803.

It is not a weakly prime, because it can be changed into another prime (849879851) 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, 424939929 + 424939930.

It is an arithmetic number, because the mean of its divisors is an integer number (424939930).

Almost surely, 2^849879859 is an apocalyptic number.

849879859 is a deficient number, since it is larger than the sum of its proper divisors (1).

849879859 is an equidigital number, since it uses as much as digits as its factorization.

849879859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 67.

The square root of 849879859 is about 29152.6990002641. The cubic root of 849879859 is about 947.2236053759.

The spelling of 849879859 in words is "eight hundred forty-nine million, eight hundred seventy-nine thousand, eight hundred fifty-nine".