998849281 has 4 divisors (see below), whose sum is σ = 998914564. Its totient is φ = 998784000.

The previous prime is 998849249. The next prime is 998849287. The reversal of 998849281 is 182948899.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 450118656 + 548730625 = 21216^2 + 23425^2 .

It is a 3-Lehmer number, since φ(998849281) divides (998849281-1)³.

It is a cyclic number.

It is not a de Polignac number, because 998849281 - 2⁵ = 998849249 is a prime.

It is a super-2 number, since 2×998849281² = 1995399772308433922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998849287) 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, 4081 + ... + 44881.

It is an arithmetic number, because the mean of its divisors is an integer number (249728641).

Almost surely, 2^998849281 is an apocalyptic number.

It is an amenable number.

998849281 is a deficient number, since it is larger than the sum of its proper divisors (65283).

998849281 is a wasteful number, since it uses less digits than its factorization.

998849281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65282.

The product of its digits is 2985984, while the sum is 58.

The square root of 998849281 is about 31604.5768995568. The cubic root of 998849281 is about 999.6162797776.

The spelling of 998849281 in words is "nine hundred ninety-eight million, eight hundred forty-nine thousand, two hundred eighty-one".