243514109 has 2 divisors, whose sum is σ = 243514110. Its totient is φ = 243514108.

The previous prime is 243514099. The next prime is 243514121. The reversal of 243514109 is 901415342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154306084 + 89208025 = 12422^2 + 9445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243514109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243514009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121757054 + 121757055.

It is an arithmetic number, because the mean of its divisors is an integer number (121757055).

Almost surely, 2^243514109 is an apocalyptic number.

It is an amenable number.

243514109 is a deficient number, since it is larger than the sum of its proper divisors (1).

243514109 is an equidigital number, since it uses as much as digits as its factorization.

243514109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 243514109 is about 15604.9386092993. The cubic root of 243514109 is about 624.4649150386.

The spelling of 243514109 in words is "two hundred forty-three million, five hundred fourteen thousand, one hundred nine".