998891827 has 8 divisors (see below), whose sum is σ = 1031685120. Its totient is φ = 966134280.

The previous prime is 998891819. The next prime is 998891833. The reversal of 998891827 is 728198899.

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 998891827 - 2³ = 998891819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998891857) 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, 55308 + ... + 71110.

It is an arithmetic number, because the mean of its divisors is an integer number (128960640).

Almost surely, 2^998891827 is an apocalyptic number.

998891827 is the 15803-rd decagonal number.

998891827 is a deficient number, since it is larger than the sum of its proper divisors (32793293).

998891827 is a wasteful number, since it uses less digits than its factorization.

998891827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17873.

The product of its digits is 5225472, while the sum is 61.

The square root of 998891827 is about 31605.2499911012. The cubic root of 998891827 is about 999.6304724662.

The spelling of 998891827 in words is "nine hundred ninety-eight million, eight hundred ninety-one thousand, eight hundred twenty-seven".