1001009998 has 8 divisors (see below), whose sum is σ = 1538137440. Its totient is φ = 488297520.

The previous prime is 1001009987. The next prime is 1001010011. The reversal of 1001009998 is 8999001001.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6103638 + ... + 6103801.

It is an arithmetic number, because the mean of its divisors is an integer number (192267180).

Almost surely, 2^1001009998 is an apocalyptic number.

1001009998 is a deficient number, since it is larger than the sum of its proper divisors (537127442).

1001009998 is a wasteful number, since it uses less digits than its factorization.

1001009998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12207482.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 1001009998 is about 31638.7420419965. The cubic root of 1001009998 is about 1000.3365527196.

The spelling of 1001009998 in words is "one billion, one million, nine thousand, nine hundred ninety-eight".