273828821 has 4 divisors (see below), whose sum is σ = 312947232. Its totient is φ = 234710412.

The previous prime is 273828803. The next prime is 273828827. The reversal of 273828821 is 128828372.

It is a happy number.

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 273828821 - 2¹⁴ = 273812437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273828827) 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, 19559195 + ... + 19559208.

It is an arithmetic number, because the mean of its divisors is an integer number (78236808).

Almost surely, 2^273828821 is an apocalyptic number.

It is an amenable number.

273828821 is a deficient number, since it is larger than the sum of its proper divisors (39118411).

273828821 is an equidigital number, since it uses as much as digits as its factorization.

273828821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39118410.

The product of its digits is 86016, while the sum is 41.

The square root of 273828821 is about 16547.7738986246. The cubic root of 273828821 is about 649.3712428752.

The spelling of 273828821 in words is "two hundred seventy-three million, eight hundred twenty-eight thousand, eight hundred twenty-one".