849289187 has 2 divisors, whose sum is σ = 849289188. Its totient is φ = 849289186.

The previous prime is 849289183. The next prime is 849289229. The reversal of 849289187 is 781982948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 849289187 - 2² = 849289183 is a prime.

It is not a weakly prime, because it can be changed into another prime (849289183) 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, 424644593 + 424644594.

It is an arithmetic number, because the mean of its divisors is an integer number (424644594).

Almost surely, 2^849289187 is an apocalyptic number.

849289187 is a deficient number, since it is larger than the sum of its proper divisors (1).

849289187 is an equidigital number, since it uses as much as digits as its factorization.

849289187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 56.

The square root of 849289187 is about 29142.5665822350. The cubic root of 849289187 is about 947.0041123405.

It can be divided in two parts, 8492 and 89187, that added together give a palindrome (97679).

The spelling of 849289187 in words is "eight hundred forty-nine million, two hundred eighty-nine thousand, one hundred eighty-seven".