211189093 has 2 divisors, whose sum is σ = 211189094. Its totient is φ = 211189092.

The previous prime is 211189091. The next prime is 211189109. The reversal of 211189093 is 390981112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209178369 + 2010724 = 14463^2 + 1418^2 .

It is a cyclic number.

It is not a de Polignac number, because 211189093 - 2¹ = 211189091 is a prime.

Together with 211189091, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211189091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105594546 + 105594547.

It is an arithmetic number, because the mean of its divisors is an integer number (105594547).

Almost surely, 2^211189093 is an apocalyptic number.

It is an amenable number.

211189093 is a deficient number, since it is larger than the sum of its proper divisors (1).

211189093 is an equidigital number, since it uses as much as digits as its factorization.

211189093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 211189093 is about 14532.3464382047. The cubic root of 211189093 is about 595.5119694885.

It can be divided in two parts, 2111 and 89093, that added together give a square (91204 = 302²).

The spelling of 211189093 in words is "two hundred eleven million, one hundred eighty-nine thousand, ninety-three".