1001001000 has 64 divisors (see below), whose sum is σ = 3123132480. Its totient is φ = 266932800.

The previous prime is 1001000989. The next prime is 1001001011. The reversal of 1001001000 is 1001001.

It is an interprime number because it is at equal distance from previous prime (1001000989) and next prime (1001001011).

It is a Harshad number since it is a multiple of its sum of digits (3).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163834 + ... + 169833.

It is an arithmetic number, because the mean of its divisors is an integer number (48798945).

Almost surely, 2^1001001000 is an apocalyptic number.

1001001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001001000 is an abundant number, since it is smaller than the sum of its proper divisors (2122131480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001001000 is a wasteful number, since it uses less digits than its factorization.

1001001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333691 (or 333677 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 3.

The square root of 1001001000 is about 31638.5998425973. The cubic root of 1001001000 is about 1000.3335553951. Note that the first 3 decimals are identical.

Adding to 1001001000 its reverse (1001001), we get a palindrome (1002002001).

Subtracting from 1001001000 its reverse (1001001), we obtain a palindrome (999999999).

1001001000 divided by its reverse (1001001) gives a cube (1000 = 10³).

The spelling of 1001001000 in words is "one billion, one million, one thousand".