243480709 has 2 divisors, whose sum is σ = 243480710. Its totient is φ = 243480708.

The previous prime is 243480697. The next prime is 243480733. The reversal of 243480709 is 907084342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215443684 + 28037025 = 14678^2 + 5295^2 .

It is a cyclic number.

It is not a de Polignac number, because 243480709 - 2⁷ = 243480581 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 (243480739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121740354 + 121740355.

It is an arithmetic number, because the mean of its divisors is an integer number (121740355).

Almost surely, 2^243480709 is an apocalyptic number.

It is an amenable number.

243480709 is a deficient number, since it is larger than the sum of its proper divisors (1).

243480709 is an equidigital number, since it uses as much as digits as its factorization.

243480709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 243480709 is about 15603.8683985735. The cubic root of 243480709 is about 624.4363635351.

The spelling of 243480709 in words is "two hundred forty-three million, four hundred eighty thousand, seven hundred nine".