189990211 has 8 divisors (see below), whose sum is σ = 195047424. Its totient is φ = 184962120.

The previous prime is 189990209. The next prime is 189990239. The reversal of 189990211 is 112099981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189990211 - 2¹ = 189990209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189990271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6270 + ... + 20476.

It is an arithmetic number, because the mean of its divisors is an integer number (24380928).

Almost surely, 2^189990211 is an apocalyptic number.

189990211 is a deficient number, since it is larger than the sum of its proper divisors (5057213).

189990211 is a wasteful number, since it uses less digits than its factorization.

189990211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14561.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 189990211 is about 13783.6936631659. The cubic root of 189990211 is about 574.8798347506.

The spelling of 189990211 in words is "one hundred eighty-nine million, nine hundred ninety thousand, two hundred eleven".