1998343773 has 24 divisors (see below), whose sum is σ = 2989258272. Its totient is φ = 1285548768.

The previous prime is 1998343751. The next prime is 1998343901. The reversal of 1998343773 is 3773438991.

It is a happy number.

1998343773 is a `hidden beast` number, since 199 + 83 + 4 + 377 + 3 = 666.

It is not a de Polignac number, because 1998343773 - 2⁶ = 1998343709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998343723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1015 + ... + 63227.

It is an arithmetic number, because the mean of its divisors is an integer number (124552428).

Almost surely, 2^1998343773 is an apocalyptic number.

It is an amenable number.

1998343773 is a deficient number, since it is larger than the sum of its proper divisors (990914499).

1998343773 is a wasteful number, since it uses less digits than its factorization.

1998343773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62345 (or 62342 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The square root of 1998343773 is about 44702.8385340350. The cubic root of 1998343773 is about 1259.5731679718.

The spelling of 1998343773 in words is "one billion, nine hundred ninety-eight million, three hundred forty-three thousand, seven hundred seventy-three".