2009516879 has 4 divisors (see below), whose sum is σ = 2063828184. Its totient is φ = 1955205576.

The previous prime is 2009516867. The next prime is 2009516881. The reversal of 2009516879 is 9786159002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2009516879 - 2⁸ = 2009516623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009576879) 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, 27155597 + ... + 27155670.

It is an arithmetic number, because the mean of its divisors is an integer number (515957046).

Almost surely, 2^2009516879 is an apocalyptic number.

2009516879 is a deficient number, since it is larger than the sum of its proper divisors (54311305).

2009516879 is an equidigital number, since it uses as much as digits as its factorization.

2009516879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54311304.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 2009516879 is about 44827.6352153446. The cubic root of 2009516879 is about 1261.9163078256.

The spelling of 2009516879 in words is "two billion, nine million, five hundred sixteen thousand, eight hundred seventy-nine".