243085729 has 2 divisors, whose sum is σ = 243085730. Its totient is φ = 243085728.

The previous prime is 243085709. The next prime is 243085757. The reversal of 243085729 is 927580342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241864704 + 1221025 = 15552^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 243085729 - 2¹³ = 243077537 is a prime.

It is a super-2 number, since 2×243085729² = 118181343286922882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243085691 and 243085700.

It is not a weakly prime, because it can be changed into another prime (243085709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121542864 + 121542865.

It is an arithmetic number, because the mean of its divisors is an integer number (121542865).

Almost surely, 2^243085729 is an apocalyptic number.

It is an amenable number.

243085729 is a deficient number, since it is larger than the sum of its proper divisors (1).

243085729 is an equidigital number, since it uses as much as digits as its factorization.

243085729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 243085729 is about 15591.2067845950. The cubic root of 243085729 is about 624.0985224463.

The spelling of 243085729 in words is "two hundred forty-three million, eighty-five thousand, seven hundred twenty-nine".