211087867 has 4 divisors (see below), whose sum is σ = 211318480. Its totient is φ = 210857256.

The previous prime is 211087837. The next prime is 211087871. The reversal of 211087867 is 768780112.

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 211087867 - 2²⁷ = 76870139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211087837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113928 + ... + 115765.

It is an arithmetic number, because the mean of its divisors is an integer number (52829620).

Almost surely, 2^211087867 is an apocalyptic number.

211087867 is a deficient number, since it is larger than the sum of its proper divisors (230613).

211087867 is an equidigital number, since it uses as much as digits as its factorization.

211087867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230612.

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 211087867 is about 14528.8632383955. The cubic root of 211087867 is about 595.4168084371.

The spelling of 211087867 in words is "two hundred eleven million, eighty-seven thousand, eight hundred sixty-seven".