998899 has 8 divisors (see below), whose sum is σ = 1105920. Its totient is φ = 894600.

The previous prime is 998897. The next prime is 998909.

998899 = 19⁴ + 20⁴ + ... + 23⁴.

998899 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 998899 - 2¹ = 998897 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998897) 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, 142 + ... + 1420.

It is an arithmetic number, because the mean of its divisors is an integer number (138240).

2⁹⁹⁸⁸⁹⁹ is an apocalyptic number.

998899 is a deficient number, since it is larger than the sum of its proper divisors (107021).

998899 is a wasteful number, since it uses less digits than its factorization.

998899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361.

The product of its digits is 419904, while the sum is 52.

The square root of 998899 is about 999.4493483914. The cubic root of 998899 is about 99.9632865229.

It can be divided in two parts, 99 and 8899, that added together give a palindrome (8998).

The spelling of 998899 in words is "nine hundred ninety-eight thousand, eight hundred ninety-nine".