240307409 has 2 divisors, whose sum is σ = 240307410. Its totient is φ = 240307408.

The previous prime is 240307399. The next prime is 240307411. The reversal of 240307409 is 904703042.

240307409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147088384 + 93219025 = 12128^2 + 9655^2 .

It is a cyclic number.

It is not a de Polignac number, because 240307409 - 2⁸ = 240307153 is a prime.

It is a super-3 number, since 3×240307409³ (a number of 26 digits) contains 333 as substring.

Together with 240307411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240307439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120153704 + 120153705.

It is an arithmetic number, because the mean of its divisors is an integer number (120153705).

Almost surely, 2^240307409 is an apocalyptic number.

It is an amenable number.

240307409 is a deficient number, since it is larger than the sum of its proper divisors (1).

240307409 is an equidigital number, since it uses as much as digits as its factorization.

240307409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 240307409 is about 15501.8517926085. The cubic root of 240307409 is about 621.7117188857.

The spelling of 240307409 in words is "two hundred forty million, three hundred seven thousand, four hundred nine".