2823621 has 4 divisors (see below), whose sum is σ = 3764832. Its totient is φ = 1882412.

The previous prime is 2823617. The next prime is 2823631. The reversal of 2823621 is 1263282.

2823621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2823621 - 2² = 2823617 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 2823591 and 2823600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2823631) 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, 470601 + ... + 470606.

It is an arithmetic number, because the mean of its divisors is an integer number (941208).

2^2823621 is an apocalyptic number.

It is an amenable number.

2823621 is a deficient number, since it is larger than the sum of its proper divisors (941211).

2823621 is an equidigital number, since it uses as much as digits as its factorization.

2823621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941210.

The product of its digits is 1152, while the sum is 24.

The square root of 2823621 is about 1680.3633535637. The cubic root of 2823621 is about 141.3412087449.

The spelling of 2823621 in words is "two million, eight hundred twenty-three thousand, six hundred twenty-one".