229972189 has 2 divisors, whose sum is σ = 229972190. Its totient is φ = 229972188.

The previous prime is 229972177. The next prime is 229972199. The reversal of 229972189 is 981279922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119028100 + 110944089 = 10910^2 + 10533^2 .

It is a cyclic number.

It is not a de Polignac number, because 229972189 - 2²³ = 221583581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229972129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114986094 + 114986095.

It is an arithmetic number, because the mean of its divisors is an integer number (114986095).

Almost surely, 2^229972189 is an apocalyptic number.

It is an amenable number.

229972189 is a deficient number, since it is larger than the sum of its proper divisors (1).

229972189 is an equidigital number, since it uses as much as digits as its factorization.

229972189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 229972189 is about 15164.8339588668. The cubic root of 229972189 is about 612.6678714651.

The spelling of 229972189 in words is "two hundred twenty-nine million, nine hundred seventy-two thousand, one hundred eighty-nine".