998893807 has 4 divisors (see below), whose sum is σ = 1001385216. Its totient is φ = 996402400.

The previous prime is 998893771. The next prime is 998893879. The reversal of 998893807 is 708398899.

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 998893807 - 2²³ = 990505199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998893307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245103 + ... + 1245904.

It is an arithmetic number, because the mean of its divisors is an integer number (250346304).

Almost surely, 2^998893807 is an apocalyptic number.

998893807 is a deficient number, since it is larger than the sum of its proper divisors (2491409).

998893807 is a wasteful number, since it uses less digits than its factorization.

998893807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491408.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The square root of 998893807 is about 31605.2813149954. The cubic root of 998893807 is about 999.6311329538.

The spelling of 998893807 in words is "nine hundred ninety-eight million, eight hundred ninety-three thousand, eight hundred seven".