899984243 has 4 divisors (see below), whose sum is σ = 901078608. Its totient is φ = 898889880.

The previous prime is 899984207. The next prime is 899984251. The reversal of 899984243 is 342489998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342489998 = 2 ⋅171244999.

It is a cyclic number.

It is not a de Polignac number, because 899984243 - 2¹⁶ = 899918707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (899984203) 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 3 ways as a sum of consecutive naturals, for example, 545948 + ... + 547593.

It is an arithmetic number, because the mean of its divisors is an integer number (225269652).

Almost surely, 2^899984243 is an apocalyptic number.

899984243 is a deficient number, since it is larger than the sum of its proper divisors (1094365).

899984243 is a wasteful number, since it uses less digits than its factorization.

899984243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094364.

The product of its digits is 4478976, while the sum is 56.

The square root of 899984243 is about 29999.7373821839. The cubic root of 899984243 is about 965.4837500482.

The spelling of 899984243 in words is "eight hundred ninety-nine million, nine hundred eighty-four thousand, two hundred forty-three".