1089999801 has 32 divisors (see below), whose sum is σ = 1804602240. Its totient is φ = 644486400.

The previous prime is 1089999791. The next prime is 1089999803.

1089999801 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1089999801 - 2⁹ = 1089999289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1089999803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32580 + ... + 56933.

It is an arithmetic number, because the mean of its divisors is an integer number (56393820).

Almost surely, 2^1089999801 is an apocalyptic number.

1089999801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1089999801 is a deficient number, since it is larger than the sum of its proper divisors (714602439).

1089999801 is a wasteful number, since it uses less digits than its factorization.

1089999801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89574 (or 89568 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 54.

The square root of 1089999801 is about 33015.1450246701. The cubic root of 1089999801 is about 1029.1424039417.

The spelling of 1089999801 in words is "one billion, eighty-nine million, nine hundred ninety-nine thousand, eight hundred one".