2833721 has 4 divisors (see below), whose sum is σ = 3091344. Its totient is φ = 2576100.

The previous prime is 2833709. The next prime is 2833723. The reversal of 2833721 is 1273382.

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 2833721 - 2¹⁴ = 2817337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2833723) 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, 128795 + ... + 128816.

It is an arithmetic number, because the mean of its divisors is an integer number (772836).

2^2833721 is an apocalyptic number.

It is an amenable number.

2833721 is a deficient number, since it is larger than the sum of its proper divisors (257623).

2833721 is a wasteful number, since it uses less digits than its factorization.

2833721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257622.

The product of its digits is 2016, while the sum is 26.

The square root of 2833721 is about 1683.3659732809. The cubic root of 2833721 is about 141.5095325022.

It can be divided in two parts, 283 and 3721, that added together give a palindrome (4004).

The spelling of 2833721 in words is "two million, eight hundred thirty-three thousand, seven hundred twenty-one".