9219890189 has 2 divisors, whose sum is σ = 9219890190. Its totient is φ = 9219890188.

The previous prime is 9219890179. The next prime is 9219890231. The reversal of 9219890189 is 9810989129.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8974341289 + 245548900 = 94733^2 + 15670^2 .

It is an emirp because it is prime and its reverse (9810989129) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9219890189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9219890179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4609945094 + 4609945095.

It is an arithmetic number, because the mean of its divisors is an integer number (4609945095).

Almost surely, 2^9219890189 is an apocalyptic number.

It is an amenable number.

9219890189 is a deficient number, since it is larger than the sum of its proper divisors (1).

9219890189 is an equidigital number, since it uses as much as digits as its factorization.

9219890189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 56.

The square root of 9219890189 is about 96020.2592633450. The cubic root of 9219890189 is about 2096.8880732715. Note that the first 3 decimals are identical.

The spelling of 9219890189 in words is "nine billion, two hundred nineteen million, eight hundred ninety thousand, one hundred eighty-nine".