849278609 has 4 divisors (see below), whose sum is σ = 849808704. Its totient is φ = 848748516.

The previous prime is 849278531. The next prime is 849278629. The reversal of 849278609 is 906872948.

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 849278609 - 2¹⁶ = 849213073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849278629) 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, 262637 + ... + 265850.

It is an arithmetic number, because the mean of its divisors is an integer number (212452176).

Almost surely, 2^849278609 is an apocalyptic number.

It is an amenable number.

849278609 is a deficient number, since it is larger than the sum of its proper divisors (530095).

849278609 is a wasteful number, since it uses less digits than its factorization.

849278609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530094.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 849278609 is about 29142.3850945663. The cubic root of 849278609 is about 947.0001806404. Note that the first 3 decimals are identical.

The spelling of 849278609 in words is "eight hundred forty-nine million, two hundred seventy-eight thousand, six hundred nine".