821442327 has 8 divisors (see below), whose sum is σ = 1095400320. Its totient is φ = 547556280.

The previous prime is 821442299. The next prime is 821442331. The reversal of 821442327 is 723244128.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 821442327 - 2¹⁰ = 821441303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821442337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20302 + ... + 45332.

It is an arithmetic number, because the mean of its divisors is an integer number (136925040).

Almost surely, 2^821442327 is an apocalyptic number.

821442327 is a deficient number, since it is larger than the sum of its proper divisors (273957993).

821442327 is a wasteful number, since it uses less digits than its factorization.

821442327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35973.

The product of its digits is 21504, while the sum is 33.

The square root of 821442327 is about 28660.8151838010. The cubic root of 821442327 is about 936.5386229370.

The spelling of 821442327 in words is "eight hundred twenty-one million, four hundred forty-two thousand, three hundred twenty-seven".