998304409 has 4 divisors (see below), whose sum is σ = 999290916. Its totient is φ = 997317904.

The previous prime is 998304401. The next prime is 998304427. The reversal of 998304409 is 904403899.

998304409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 249734809 + 748569600 = 15803^2 + 27360^2 .

It is a cyclic number.

It is not a de Polignac number, because 998304409 - 2³ = 998304401 is a prime.

It is a super-2 number, since 2×998304409² = 1993223386057678562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998304401) 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, 491734 + ... + 493759.

It is an arithmetic number, because the mean of its divisors is an integer number (249822729).

Almost surely, 2^998304409 is an apocalyptic number.

It is an amenable number.

998304409 is a deficient number, since it is larger than the sum of its proper divisors (986507).

998304409 is a wasteful number, since it uses less digits than its factorization.

998304409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986506.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 998304409 is about 31595.9555797890. The cubic root of 998304409 is about 999.4344832511.

The spelling of 998304409 in words is "nine hundred ninety-eight million, three hundred four thousand, four hundred nine".