1009091001 has 4 divisors (see below), whose sum is σ = 1345454672. Its totient is φ = 672727332.

The previous prime is 1009090963. The next prime is 1009091003. The reversal of 1009091001 is 1001909001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1009091001 - 2¹¹ = 1009088953 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 (1009091003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168181831 + ... + 168181836.

It is an arithmetic number, because the mean of its divisors is an integer number (336363668).

Almost surely, 2^1009091001 is an apocalyptic number.

It is an amenable number.

1009091001 is a deficient number, since it is larger than the sum of its proper divisors (336363671).

1009091001 is an equidigital number, since it uses as much as digits as its factorization.

1009091001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336363670.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 1009091001 is about 31766.1927369334. The cubic root of 1009091001 is about 1003.0211968442.

The spelling of 1009091001 in words is "one billion, nine million, ninety-one thousand, one".