821230941 has 4 divisors (see below), whose sum is σ = 1094974592. Its totient is φ = 547487292.

The previous prime is 821230937. The next prime is 821230981. The reversal of 821230941 is 149032128.

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 not a de Polignac number, because 821230941 - 2² = 821230937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 821230899 and 821230908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821230931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136871821 + ... + 136871826.

It is an arithmetic number, because the mean of its divisors is an integer number (273743648).

Almost surely, 2^821230941 is an apocalyptic number.

It is an amenable number.

821230941 is a deficient number, since it is larger than the sum of its proper divisors (273743651).

821230941 is a wasteful number, since it uses less digits than its factorization.

821230941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273743650.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 821230941 is about 28657.1272286669. The cubic root of 821230941 is about 936.4582812701.

The spelling of 821230941 in words is "eight hundred twenty-one million, two hundred thirty thousand, nine hundred forty-one".