899441921 has 8 divisors (see below), whose sum is σ = 1039484160. Its totient is φ = 762287328.

The previous prime is 899441911. The next prime is 899441957. The reversal of 899441921 is 129144998.

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

It is a cyclic number.

It is not a de Polignac number, because 899441921 - 2¹⁸ = 899179777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (899441911) 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, 721241 + ... + 722486.

It is an arithmetic number, because the mean of its divisors is an integer number (129935520).

Almost surely, 2^899441921 is an apocalyptic number.

It is an amenable number.

899441921 is a deficient number, since it is larger than the sum of its proper divisors (140042239).

899441921 is a wasteful number, since it uses less digits than its factorization.

899441921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443823.

The product of its digits is 186624, while the sum is 47.

The square root of 899441921 is about 29990.6972409779. The cubic root of 899441921 is about 965.2897806203.

The spelling of 899441921 in words is "eight hundred ninety-nine million, four hundred forty-one thousand, nine hundred twenty-one".