999998001 has 16 divisors (see below), whose sum is σ = 1521520000. Its totient is φ = 648646704.

The previous prime is 999997967. The next prime is 999998003. The reversal of 999998001 is 100899999.

999998001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 999998001 - 2⁹ = 999997489 is a prime.

It is a Duffinian number.

999998001 is a modest number, since divided by 998001 gives 999 as remainder.

It is not an unprimeable number, because it can be changed into a prime (999998003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499501 + ... + 501498.

It is an arithmetic number, because the mean of its divisors is an integer number (95095000).

Almost surely, 2^999998001 is an apocalyptic number.

It is an amenable number.

999998001 is a deficient number, since it is larger than the sum of its proper divisors (521521999).

999998001 is a wasteful number, since it uses less digits than its factorization.

999998001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001045 (or 1001039 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 54.

The square root of 999998001 is about 31622.7449947028. The cubic root of 999998001 is about 999.9993336662. Note that the first 3 decimals are identical.

It can be divided in two parts, 999 and 998001, that multiplied together give a cube (997002999 = 999³).

The spelling of 999998001 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, one".