1000990001 has 8 divisors (see below), whose sum is σ = 1092291744. Its totient is φ = 909738720.

The previous prime is 1000989989. The next prime is 1000990051.

1000990001 is nontrivially palindromic in base 10.

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

It is a de Polignac number, because none of the positive numbers 2^k-1000990001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000990051) 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 7 ways as a sum of consecutive naturals, for example, 37565 + ... + 58421.

It is an arithmetic number, because the mean of its divisors is an integer number (136536468).

Almost surely, 2^1000990001 is an apocalyptic number.

1000990001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000990001 is a deficient number, since it is larger than the sum of its proper divisors (91301743).

1000990001 is a wasteful number, since it uses less digits than its factorization.

1000990001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25231.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 1000990001 is about 31638.4260196363. The cubic root of 1000990001 is about 1000.3298914930.

The spelling of 1000990001 in words is "one billion, nine hundred ninety thousand, one".