998317 has 4 divisors (see below), whose sum is σ = 1050880. Its totient is φ = 945756.

The previous prime is 998311. The next prime is 998329. The reversal of 998317 is 713899.

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, and also an emirpimes, since its reverse is a distinct semiprime: 713899 = 31 ⋅23029.

It is a cyclic number.

It is not a de Polignac number, because 998317 - 2¹⁹ = 474029 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 (998311) 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, 26253 + ... + 26290.

It is an arithmetic number, because the mean of its divisors is an integer number (262720).

2⁹⁹⁸³¹⁷ is an apocalyptic number.

It is an amenable number.

998317 is a deficient number, since it is larger than the sum of its proper divisors (52563).

998317 is a wasteful number, since it uses less digits than its factorization.

998317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52562.

The product of its digits is 13608, while the sum is 37.

The square root of 998317 is about 999.1581456406. The cubic root of 998317 is about 99.9438684984.

It can be divided in two parts, 9983 and 17, that added together give a 4-th power (10000 = 10⁴).

The spelling of 998317 in words is "nine hundred ninety-eight thousand, three hundred seventeen".