998604097 has 4 divisors (see below), whose sum is σ = 1005893316. Its totient is φ = 991314880.

The previous prime is 998604037. The next prime is 998604121. The reversal of 998604097 is 790406899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 790406899 = 179 ⋅4415681.

It can be written as a sum of positive squares in 2 ways, for example, as 473323536 + 525280561 = 21756^2 + 22919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998604097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998604017) 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, 3644404 + ... + 3644677.

It is an arithmetic number, because the mean of its divisors is an integer number (251473329).

Almost surely, 2^998604097 is an apocalyptic number.

It is an amenable number.

998604097 is a deficient number, since it is larger than the sum of its proper divisors (7289219).

998604097 is a wasteful number, since it uses less digits than its factorization.

998604097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7289218.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 998604097 is about 31600.6977296388. The cubic root of 998604097 is about 999.5344823269.

The spelling of 998604097 in words is "nine hundred ninety-eight million, six hundred four thousand, ninety-seven".