2009359891 has 16 divisors (see below), whose sum is σ = 2585991168. Its totient is φ = 1515225600.

The previous prime is 2009359883. The next prime is 2009359901. The reversal of 2009359891 is 1989539002.

It is not a de Polignac number, because 2009359891 - 2³ = 2009359883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2009359831) 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, 418510 + ... + 423283.

It is an arithmetic number, because the mean of its divisors is an integer number (161624448).

Almost surely, 2^2009359891 is an apocalyptic number.

2009359891 is a deficient number, since it is larger than the sum of its proper divisors (576631277).

2009359891 is a wasteful number, since it uses less digits than its factorization.

2009359891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841842.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 2009359891 is about 44825.8841630592. The cubic root of 2009359891 is about 1261.8834457186.

The spelling of 2009359891 in words is "two billion, nine million, three hundred fifty-nine thousand, eight hundred ninety-one".