844653009 has 4 divisors (see below), whose sum is σ = 1126204016. Its totient is φ = 563102004.

The previous prime is 844652953. The next prime is 844653059. The reversal of 844653009 is 900356448.

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 not a de Polignac number, because 844653009 - 2¹⁵ = 844620241 is a prime.

It is a super-2 number, since 2×844653009² = 1426877411225508162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (844653059) 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 in 3 ways as a sum of consecutive naturals, for example, 140775499 + ... + 140775504.

It is an arithmetic number, because the mean of its divisors is an integer number (281551004).

Almost surely, 2^844653009 is an apocalyptic number.

It is an amenable number.

844653009 is a deficient number, since it is larger than the sum of its proper divisors (281551007).

844653009 is a wasteful number, since it uses less digits than its factorization.

844653009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281551006.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 844653009 is about 29062.9146680095. The cubic root of 844653009 is about 945.2777694696.

The spelling of 844653009 in words is "eight hundred forty-four million, six hundred fifty-three thousand, nine".