999998893 has 4 divisors (see below), whose sum is σ = 1004148508. Its totient is φ = 995849280.

The previous prime is 999998869. The next prime is 999998903. The reversal of 999998893 is 398899999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 933119209 + 66879684 = 30547^2 + 8178^2 .

It is a cyclic number.

It is not a de Polignac number, because 999998893 - 2¹⁷ = 999867821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999998843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2074446 + ... + 2074927.

It is an arithmetic number, because the mean of its divisors is an integer number (251037127).

Almost surely, 2^999998893 is an apocalyptic number.

It is an amenable number.

999998893 is a deficient number, since it is larger than the sum of its proper divisors (4149615).

999998893 is a wasteful number, since it uses less digits than its factorization.

999998893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4149614.

The product of its digits is 102036672, while the sum is 73.

The square root of 999998893 is about 31622.7590984721. The cubic root of 999998893 is about 999.9996309999. Note that the first 3 decimals are identical.

The spelling of 999998893 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, eight hundred ninety-three".