243830089 has 2 divisors, whose sum is σ = 243830090. Its totient is φ = 243830088.

The previous prime is 243830087. The next prime is 243830141. The reversal of 243830089 is 980038342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223652025 + 20178064 = 14955^2 + 4492^2 .

It is a cyclic number.

It is not a de Polignac number, because 243830089 - 2¹ = 243830087 is a prime.

It is a super-2 number, since 2×243830089² = 118906224603495842, which contains 22 as substring.

Together with 243830087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (243830087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121915044 + 121915045.

It is an arithmetic number, because the mean of its divisors is an integer number (121915045).

Almost surely, 2^243830089 is an apocalyptic number.

It is an amenable number.

243830089 is a deficient number, since it is larger than the sum of its proper divisors (1).

243830089 is an equidigital number, since it uses as much as digits as its factorization.

243830089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 243830089 is about 15615.0596860851. The cubic root of 243830089 is about 624.7348968484.

The spelling of 243830089 in words is "two hundred forty-three million, eight hundred thirty thousand, eighty-nine".