998044321 has 4 divisors (see below), whose sum is σ = 998203312. Its totient is φ = 997885332.

The previous prime is 998044277. The next prime is 998044339. The reversal of 998044321 is 123440899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 998044321 - 2¹³ = 998036129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998044351) 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, 69675 + ... + 82768.

It is an arithmetic number, because the mean of its divisors is an integer number (249550828).

Almost surely, 2^998044321 is an apocalyptic number.

It is an amenable number.

998044321 is a deficient number, since it is larger than the sum of its proper divisors (158991).

998044321 is a wasteful number, since it uses less digits than its factorization.

998044321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158990.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 998044321 is about 31591.8394684450. The cubic root of 998044321 is about 999.3476815732.

The spelling of 998044321 in words is "nine hundred ninety-eight million, forty-four thousand, three hundred twenty-one".