998984657 has 8 divisors (see below), whose sum is σ = 1090498080. Its totient is φ = 907587360.

The previous prime is 998984627. The next prime is 998984681. The reversal of 998984657 is 756489899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 998984657 - 2¹² = 998980561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 998984593 and 998984602.

It is not an unprimeable number, because it can be changed into a prime (998984627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10523 + ... + 45920.

It is an arithmetic number, because the mean of its divisors is an integer number (136312260).

Almost surely, 2^998984657 is an apocalyptic number.

It is an amenable number.

998984657 is a deficient number, since it is larger than the sum of its proper divisors (91513423).

998984657 is a wasteful number, since it uses less digits than its factorization.

998984657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58063.

The product of its digits is 39191040, while the sum is 65.

The square root of 998984657 is about 31606.7185421075. The cubic root of 998984657 is about 999.6614377219.

The spelling of 998984657 in words is "nine hundred ninety-eight million, nine hundred eighty-four thousand, six hundred fifty-seven".