2321678649 has 4 divisors (see below), whose sum is σ = 3095571536. Its totient is φ = 1547785764.

The previous prime is 2321678591. The next prime is 2321678659. The reversal of 2321678649 is 9468761232.

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 2321678649 - 2⁷ = 2321678521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2321678598 and 2321678607.

It is not an unprimeable number, because it can be changed into a prime (2321678659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386946439 + ... + 386946444.

It is an arithmetic number, because the mean of its divisors is an integer number (773892884).

Almost surely, 2^2321678649 is an apocalyptic number.

It is an amenable number.

2321678649 is a deficient number, since it is larger than the sum of its proper divisors (773892887).

2321678649 is an equidigital number, since it uses as much as digits as its factorization.

2321678649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773892886.

The product of its digits is 870912, while the sum is 48.

The square root of 2321678649 is about 48183.8006906886. The cubic root of 2321678649 is about 1324.1403987090.

The spelling of 2321678649 in words is "two billion, three hundred twenty-one million, six hundred seventy-eight thousand, six hundred forty-nine".