849243849 has 4 divisors (see below), whose sum is σ = 1132325136. Its totient is φ = 566162564.

The previous prime is 849243833. The next prime is 849243877. The reversal of 849243849 is 948342948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 849243849 - 2⁴ = 849243833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (849243149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141540639 + ... + 141540644.

It is an arithmetic number, because the mean of its divisors is an integer number (283081284).

Almost surely, 2^849243849 is an apocalyptic number.

It is an amenable number.

849243849 is a deficient number, since it is larger than the sum of its proper divisors (283081287).

849243849 is a wasteful number, since it uses less digits than its factorization.

849243849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283081286.

The product of its digits is 1990656, while the sum is 51.

The square root of 849243849 is about 29141.7887062548. The cubic root of 849243849 is about 946.9872605869.

Subtracting 849243849 from its reverse (948342948), we obtain a palindrome (99099099).

The spelling of 849243849 in words is "eight hundred forty-nine million, two hundred forty-three thousand, eight hundred forty-nine".