211969867 has 2 divisors, whose sum is σ = 211969868. Its totient is φ = 211969866.

The previous prime is 211969829. The next prime is 211969873. The reversal of 211969867 is 768969112.

211969867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211969867 - 2²⁷ = 77752139 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211969867.

It is not a weakly prime, because it can be changed into another prime (211969897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105984933 + 105984934.

It is an arithmetic number, because the mean of its divisors is an integer number (105984934).

Almost surely, 2^211969867 is an apocalyptic number.

211969867 is a deficient number, since it is larger than the sum of its proper divisors (1).

211969867 is an equidigital number, since it uses as much as digits as its factorization.

211969867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 211969867 is about 14559.1849703203. The cubic root of 211969867 is about 596.2449436493.

The spelling of 211969867 in words is "two hundred eleven million, nine hundred sixty-nine thousand, eight hundred sixty-seven".