2011979 has 4 divisors (see below), whose sum is σ = 2016240. Its totient is φ = 2007720.

The previous prime is 2011973. The next prime is 2011987. The reversal of 2011979 is 9791102.

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 2011979 - 2¹² = 2007883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1319 + ... + 2400.

It is an arithmetic number, because the mean of its divisors is an integer number (504060).

2^2011979 is an apocalyptic number.

2011979 is a deficient number, since it is larger than the sum of its proper divisors (4261).

2011979 is an equidigital number, since it uses as much as digits as its factorization.

2011979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 2011979 is about 1418.4424556534. The cubic root of 2011979 is about 126.2431476855.

The spelling of 2011979 in words is "two million, eleven thousand, nine hundred seventy-nine".