998885747 has 4 divisors (see below), whose sum is σ = 1023248856. Its totient is φ = 974522640.

The previous prime is 998885737. The next prime is 998885749. The reversal of 998885747 is 747588899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747588899 = 733 ⋅1019903.

It is a cyclic number.

It is not a de Polignac number, because 998885747 - 2⁴ = 998885731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998885749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12181493 + ... + 12181574.

It is an arithmetic number, because the mean of its divisors is an integer number (255812214).

Almost surely, 2^998885747 is an apocalyptic number.

998885747 is a deficient number, since it is larger than the sum of its proper divisors (24363109).

998885747 is a wasteful number, since it uses less digits than its factorization.

998885747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24363108.

The product of its digits is 40642560, while the sum is 65.

The square root of 998885747 is about 31605.1538044035. The cubic root of 998885747 is about 999.6284442968.

The spelling of 998885747 in words is "nine hundred ninety-eight million, eight hundred eighty-five thousand, seven hundred forty-seven".