240423409 has 2 divisors, whose sum is σ = 240423410. Its totient is φ = 240423408.

The previous prime is 240423389. The next prime is 240423431. The reversal of 240423409 is 904324042.

240423409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232471009 + 7952400 = 15247^2 + 2820^2 .

It is a cyclic number.

It is not a de Polignac number, because 240423409 - 2¹⁷ = 240292337 is a prime.

It is not a weakly prime, because it can be changed into another prime (240423109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120211704 + 120211705.

It is an arithmetic number, because the mean of its divisors is an integer number (120211705).

Almost surely, 2^240423409 is an apocalyptic number.

It is an amenable number.

240423409 is a deficient number, since it is larger than the sum of its proper divisors (1).

240423409 is an equidigital number, since it uses as much as digits as its factorization.

240423409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 240423409 is about 15505.5928296857. The cubic root of 240423409 is about 621.8117393256.

The spelling of 240423409 in words is "two hundred forty million, four hundred twenty-three thousand, four hundred nine".