240430409 has 2 divisors, whose sum is σ = 240430410. Its totient is φ = 240430408.

The previous prime is 240430373. The next prime is 240430429. The reversal of 240430409 is 904034042.

240430409 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., 238548025 + 1882384 = 15445^2 + 1372^2 .

It is a cyclic number.

It is not a de Polignac number, because 240430409 - 2²⁰ = 239381833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (240430429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120215204 + 120215205.

It is an arithmetic number, because the mean of its divisors is an integer number (120215205).

Almost surely, 2^240430409 is an apocalyptic number.

It is an amenable number.

240430409 is a deficient number, since it is larger than the sum of its proper divisors (1).

240430409 is an equidigital number, since it uses as much as digits as its factorization.

240430409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 240430409 is about 15505.8185530465. The cubic root of 240430409 is about 621.8177740124.

The spelling of 240430409 in words is "two hundred forty million, four hundred thirty thousand, four hundred nine".