2644923 has 4 divisors (see below), whose sum is σ = 3526568. Its totient is φ = 1763280.

The previous prime is 2644921. The next prime is 2644927. The reversal of 2644923 is 3294462.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2644923 - 2¹ = 2644921 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2644921) 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, 440818 + ... + 440823.

It is an arithmetic number, because the mean of its divisors is an integer number (881642).

2^2644923 is an apocalyptic number.

2644923 is a deficient number, since it is larger than the sum of its proper divisors (881645).

2644923 is an equidigital number, since it uses as much as digits as its factorization.

2644923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881644.

The product of its digits is 10368, while the sum is 30.

The square root of 2644923 is about 1626.3219238515. The cubic root of 2644923 is about 138.2943203803.

The spelling of 2644923 in words is "two million, six hundred forty-four thousand, nine hundred twenty-three".