998945493 has 16 divisors (see below), whose sum is σ = 1639295616. Its totient is φ = 526916160.

The previous prime is 998945491. The next prime is 998945531. The reversal of 998945493 is 394549899.

It is not a de Polignac number, because 998945493 - 2¹ = 998945491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998945491) 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 15 ways as a sum of consecutive naturals, for example, 1829298 + ... + 1829843.

It is an arithmetic number, because the mean of its divisors is an integer number (102455976).

Almost surely, 2^998945493 is an apocalyptic number.

It is an amenable number.

998945493 is a deficient number, since it is larger than the sum of its proper divisors (640350123).

998945493 is a wasteful number, since it uses less digits than its factorization.

998945493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659164.

The product of its digits is 12597120, while the sum is 60.

The square root of 998945493 is about 31606.0989842151. The cubic root of 998945493 is about 999.6483740403.

The spelling of 998945493 in words is "nine hundred ninety-eight million, nine hundred forty-five thousand, four hundred ninety-three".