240409999 has 2 divisors, whose sum is σ = 240410000. Its totient is φ = 240409998.

The previous prime is 240409987. The next prime is 240410011. The reversal of 240409999 is 999904042.

It is a balanced prime because it is at equal distance from previous prime (240409987) and next prime (240410011).

It is a cyclic number.

It is not a de Polignac number, because 240409999 - 2²¹ = 238312847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240401999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120204999 + 120205000.

It is an arithmetic number, because the mean of its divisors is an integer number (120205000).

Almost surely, 2^240409999 is an apocalyptic number.

240409999 is a deficient number, since it is larger than the sum of its proper divisors (1).

240409999 is an equidigital number, since it uses as much as digits as its factorization.

240409999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 240409999 is about 15505.1603990413. The cubic root of 240409999 is about 621.8001782627.

The spelling of 240409999 in words is "two hundred forty million, four hundred nine thousand, nine hundred ninety-nine".