998240317 has 4 divisors (see below), whose sum is σ = 1003256800. Its totient is φ = 993223836.

The previous prime is 998240263. The next prime is 998240339. The reversal of 998240317 is 713042899.

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: 713042899 = 43 ⋅16582393.

It is a cyclic number.

It is not a de Polignac number, because 998240317 - 2¹⁵ = 998207549 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 (998240717) 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, 2507943 + ... + 2508340.

It is an arithmetic number, because the mean of its divisors is an integer number (250814200).

Almost surely, 2^998240317 is an apocalyptic number.

It is an amenable number.

998240317 is a deficient number, since it is larger than the sum of its proper divisors (5016483).

998240317 is a wasteful number, since it uses less digits than its factorization.

998240317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5016482.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 998240317 is about 31594.9413197746. The cubic root of 998240317 is about 999.4130946095.

The spelling of 998240317 in words is "nine hundred ninety-eight million, two hundred forty thousand, three hundred seventeen".