998827 has 4 divisors (see below), whose sum is σ = 1004976. Its totient is φ = 992680.

The previous prime is 998819. The next prime is 998831. The reversal of 998827 is 728899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 998827 - 2³ = 998819 is a prime.

It is a Duffinian number.

998827 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (998857) 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, 2824 + ... + 3157.

It is an arithmetic number, because the mean of its divisors is an integer number (251244).

2⁹⁹⁸⁸²⁷ is an apocalyptic number.

998827 is a deficient number, since it is larger than the sum of its proper divisors (6149).

998827 is a wasteful number, since it uses less digits than its factorization.

998827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6148.

The product of its digits is 72576, while the sum is 43.

The square root of 998827 is about 999.4133279079. The cubic root of 998827 is about 99.9608847019.

The spelling of 998827 in words is "nine hundred ninety-eight thousand, eight hundred twenty-seven".