1010011001 has 4 divisors (see below), whose sum is σ = 1010075892. Its totient is φ = 1009946112.

The previous prime is 1010010943. The next prime is 1010011007. The reversal of 1010011001 is 1001100101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 299255401 + 710755600 = 17299^2 + 26660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010011001 - 2¹⁴ = 1009994617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1010011007) 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 3 ways as a sum of consecutive naturals, for example, 6425 + ... + 45401.

It is an arithmetic number, because the mean of its divisors is an integer number (252518973).

Almost surely, 2^1010011001 is an apocalyptic number.

It is an amenable number.

1010011001 is a deficient number, since it is larger than the sum of its proper divisors (64891).

1010011001 is an equidigital number, since it uses as much as digits as its factorization.

1010011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64890.

The product of its (nonzero) digits is 1, while the sum is 5.

The square root of 1010011001 is about 31780.6702415163. The cubic root of 1010011001 is about 1003.3259262841.

Adding to 1010011001 its reverse (1001100101), we get a palindrome (2011111102).

The spelling of 1010011001 in words is "one billion, ten million, eleven thousand, one".