1001000998 has 8 divisors (see below), whose sum is σ = 1506808008. Its totient is φ = 498731664.

The previous prime is 1001000989. The next prime is 1001001011. The reversal of 1001000998 is 8990001001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 883711 + ... + 884842.

It is an arithmetic number, because the mean of its divisors is an integer number (188351001).

Almost surely, 2^1001000998 is an apocalyptic number.

1001000998 is a deficient number, since it is larger than the sum of its proper divisors (505807010).

1001000998 is a wasteful number, since it uses less digits than its factorization.

1001000998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768838.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1001000998 is about 31638.5998109904. The cubic root of 1001000998 is about 1000.3335547289. Note that the first 3 decimals are identical.

Adding to 1001000998 its reverse (8990001001), we get a palindrome (9991001999).

The spelling of 1001000998 in words is "one billion, one million, nine hundred ninety-eight", and thus it is an aban number.