234185989 has 2 divisors, whose sum is σ = 234185990. Its totient is φ = 234185988.

The previous prime is 234185957. The next prime is 234186011. The reversal of 234185989 is 989581432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226261764 + 7924225 = 15042^2 + 2815^2 .

It is a cyclic number.

It is not a de Polignac number, because 234185989 - 2⁵ = 234185957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234185689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117092994 + 117092995.

It is an arithmetic number, because the mean of its divisors is an integer number (117092995).

Almost surely, 2^234185989 is an apocalyptic number.

It is an amenable number.

234185989 is a deficient number, since it is larger than the sum of its proper divisors (1).

234185989 is an equidigital number, since it uses as much as digits as its factorization.

234185989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 49.

The square root of 234185989 is about 15303.1365739184. The cubic root of 234185989 is about 616.3872349124.

The spelling of 234185989 in words is "two hundred thirty-four million, one hundred eighty-five thousand, nine hundred eighty-nine".