1009091009 has 16 divisors (see below), whose sum is σ = 1046836224. Its totient is φ = 972192000.

The previous prime is 1009091003. The next prime is 1009091021. The reversal of 1009091009 is 9001909001.

It is a cyclic number.

It is not a de Polignac number, because 1009091009 - 2¹² = 1009086913 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 839609 + ... + 840809.

It is an arithmetic number, because the mean of its divisors is an integer number (65427264).

Almost surely, 2^1009091009 is an apocalyptic number.

It is an amenable number.

1009091009 is a deficient number, since it is larger than the sum of its proper divisors (37745215).

1009091009 is a wasteful number, since it uses less digits than its factorization.

1009091009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 1009091009 is about 31766.1928628534. The cubic root of 1009091009 is about 1003.0211994948.

The spelling of 1009091009 in words is "one billion, nine million, ninety-one thousand, nine".