1941076821 has 4 divisors (see below), whose sum is σ = 2588102432. Its totient is φ = 1294051212.

The previous prime is 1941076801. The next prime is 1941076843. The reversal of 1941076821 is 1286701491.

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 1941076821 - 2⁶ = 1941076757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1941076821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1941076801) 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, 323512801 + ... + 323512806.

It is an arithmetic number, because the mean of its divisors is an integer number (647025608).

Almost surely, 2^1941076821 is an apocalyptic number.

It is an amenable number.

1941076821 is a deficient number, since it is larger than the sum of its proper divisors (647025611).

1941076821 is an equidigital number, since it uses as much as digits as its factorization.

1941076821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647025610.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 1941076821 is about 44057.6533760027. The cubic root of 1941076821 is about 1247.4244185624.

The spelling of 1941076821 in words is "one billion, nine hundred forty-one million, seventy-six thousand, eight hundred twenty-one".