213972189 has 8 divisors (see below), whose sum is σ = 285384672. Its totient is φ = 142603920.

The previous prime is 213972169. The next prime is 213972193. The reversal of 213972189 is 981279312.

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

It is not a de Polignac number, because 213972189 - 2⁹ = 213971677 is a prime.

It is a Curzon number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 213972189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213972119) 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, 2679 + ... + 20859.

It is an arithmetic number, because the mean of its divisors is an integer number (35673084).

Almost surely, 2^213972189 is an apocalyptic number.

It is an amenable number.

213972189 is a deficient number, since it is larger than the sum of its proper divisors (71412483).

213972189 is a wasteful number, since it uses less digits than its factorization.

213972189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22107.

The product of its digits is 54432, while the sum is 42.

The square root of 213972189 is about 14627.7882470317. The cubic root of 213972189 is about 598.1164907306.

The spelling of 213972189 in words is "two hundred thirteen million, nine hundred seventy-two thousand, one hundred eighty-nine".