201905189 has 4 divisors (see below), whose sum is σ = 207362124. Its totient is φ = 196448256.

The previous prime is 201905177. The next prime is 201905203. The reversal of 201905189 is 981509102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196420225 + 5484964 = 14015^2 + 2342^2 .

It is a cyclic number.

It is not a de Polignac number, because 201905189 - 2⁴ = 201905173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201905129) 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, 2728412 + ... + 2728485.

It is an arithmetic number, because the mean of its divisors is an integer number (51840531).

Almost surely, 2^201905189 is an apocalyptic number.

It is an amenable number.

201905189 is a deficient number, since it is larger than the sum of its proper divisors (5456935).

201905189 is an equidigital number, since it uses as much as digits as its factorization.

201905189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5456934.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 201905189 is about 14209.3345727377. The cubic root of 201905189 is about 586.6546177722.

The spelling of 201905189 in words is "two hundred one million, nine hundred five thousand, one hundred eighty-nine".