211979 has 2 divisors, whose sum is σ = 211980. Its totient is φ = 211978.

The previous prime is 211969. The next prime is 211997. The reversal of 211979 is 979112.

211979 is nontrivially palindromic in base 14.

211979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (211997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211979 - 2⁸ = 211723 is a prime.

It is not a weakly prime, because it can be changed into another prime (211949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105989 + 105990.

It is an arithmetic number, because the mean of its divisors is an integer number (105990).

2²¹¹⁹⁷⁹ is an apocalyptic number.

211979 is a deficient number, since it is larger than the sum of its proper divisors (1).

211979 is an equidigital number, since it uses as much as digits as its factorization.

211979 is an odious number, because the sum of its binary digits is odd.

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

The square root of 211979 is about 460.4117722213. The cubic root of 211979 is about 59.6253506858.

The spelling of 211979 in words is "two hundred eleven thousand, nine hundred seventy-nine".