8944491921 has 8 divisors (see below), whose sum is σ = 11929874880. Its totient is φ = 5961051792.

The previous prime is 8944491869. The next prime is 8944491949. The reversal of 8944491921 is 1291944498.

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

It is not a de Polignac number, because 8944491921 - 2²⁶ = 8877383057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8944491121) 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 7 ways as a sum of consecutive naturals, for example, 474930 + ... + 493403.

It is an arithmetic number, because the mean of its divisors is an integer number (1491234360).

Almost surely, 2^8944491921 is an apocalyptic number.

It is an amenable number.

8944491921 is a deficient number, since it is larger than the sum of its proper divisors (2985382959).

8944491921 is a wasteful number, since it uses less digits than its factorization.

8944491921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971415.

The product of its digits is 746496, while the sum is 51.

The square root of 8944491921 is about 94575.3240597144. The cubic root of 8944491921 is about 2075.7986509830.

The spelling of 8944491921 in words is "eight billion, nine hundred forty-four million, four hundred ninety-one thousand, nine hundred twenty-one".