2789823 has 4 divisors (see below), whose sum is σ = 3719768. Its totient is φ = 1859880.

The previous prime is 2789821. The next prime is 2789849. The reversal of 2789823 is 3289872.

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

It is not a de Polignac number, because 2789823 - 2¹ = 2789821 is a prime.

It is a super-2 number, since 2×2789823² = 15566224742658, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2789821) 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, 464968 + ... + 464973.

It is an arithmetic number, because the mean of its divisors is an integer number (929942).

2^2789823 is an apocalyptic number.

2789823 is a deficient number, since it is larger than the sum of its proper divisors (929945).

2789823 is an equidigital number, since it uses as much as digits as its factorization.

2789823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929944.

The product of its digits is 48384, while the sum is 39.

The square root of 2789823 is about 1670.2763244446. The cubic root of 2789823 is about 140.7750045753.

It can be divided in two parts, 278 and 9823, that added together give a palindrome (10101).

The spelling of 2789823 in words is "two million, seven hundred eighty-nine thousand, eight hundred twenty-three".