998866209 has 8 divisors (see below), whose sum is σ = 1452896352. Its totient is φ = 605373440.

The previous prime is 998866201. The next prime is 998866213. The reversal of 998866209 is 902668899.

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 998866209 - 2³ = 998866201 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (998866201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15134304 + ... + 15134369.

It is an arithmetic number, because the mean of its divisors is an integer number (181612044).

Almost surely, 2^998866209 is an apocalyptic number.

It is an amenable number.

998866209 is a deficient number, since it is larger than the sum of its proper divisors (454030143).

998866209 is a wasteful number, since it uses less digits than its factorization.

998866209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30268687.

The product of its (nonzero) digits is 3359232, while the sum is 57.

The square root of 998866209 is about 31604.8447077343. The cubic root of 998866209 is about 999.6219267453.

The spelling of 998866209 in words is "nine hundred ninety-eight million, eight hundred sixty-six thousand, two hundred nine".