189900211 has 4 divisors (see below), whose sum is σ = 190800424. Its totient is φ = 189000000.

The previous prime is 189900181. The next prime is 189900223. The reversal of 189900211 is 112009981.

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 189900211 - 2¹⁵ = 189867443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189909211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449790 + ... + 450211.

It is an arithmetic number, because the mean of its divisors is an integer number (47700106).

Almost surely, 2^189900211 is an apocalyptic number.

189900211 is a deficient number, since it is larger than the sum of its proper divisors (900213).

189900211 is an equidigital number, since it uses as much as digits as its factorization.

189900211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900212.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 189900211 is about 13780.4285492143. The cubic root of 189900211 is about 574.7890452361.

It can be divided in two parts, 189900 and 211, that multiplied together give a square (40068900 = 6330²).

The spelling of 189900211 in words is "one hundred eighty-nine million, nine hundred thousand, two hundred eleven".