1000009100 has 36 divisors (see below), whose sum is σ = 2178719928. Its totient is φ = 398400000.

The previous prime is 1000009099. The next prime is 1000009123. The reversal of 1000009100 is 19000001.

1000009100 is a modest number, since divided by 9100 gives 1000 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5180 + ... + 45020.

It is an arithmetic number, because the mean of its divisors is an integer number (60519998).

Almost surely, 2^1000009100 is an apocalyptic number.

1000009100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000009100 is an abundant number, since it is smaller than the sum of its proper divisors (1178710828).

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

1000009100 is a wasteful number, since it uses less digits than its factorization.

1000009100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40106 (or 40099 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 1000009100 is about 31622.9204849900. The cubic root of 1000009100 is about 1000.0030333241.

Adding to 1000009100 its reverse (19000001), we get a palindrome (1019009101).

The spelling of 1000009100 in words is "one billion, nine thousand, one hundred".