189471290089 has 3 divisors (see below), whose sum is σ = 189471725373. Its totient is φ = 189470854806.

The previous prime is 189471290087. The next prime is 189471290137. The reversal of 189471290089 is 980092174981.

The square root of 189471290089 is 435283.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 189471290089 - 2¹ = 189471290087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189471290081) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 217642 + ... + 652924.

It is an arithmetic number, because the mean of its divisors is an integer number (63157241791).

Almost surely, 2^189471290089 is an apocalyptic number.

189471290089 is the 435283-rd square number.

189471290089 is the 217642-nd centered octagonal number.

It is an amenable number.

189471290089 is a deficient number, since it is larger than the sum of its proper divisors (435284).

189471290089 is an frugal number, since it uses more digits than its factorization.

189471290089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870566 (or 435283 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 58.

The spelling of 189471290089 in words is "one hundred eighty-nine billion, four hundred seventy-one million, two hundred ninety thousand, eighty-nine".