240312109 has 2 divisors, whose sum is σ = 240312110. Its totient is φ = 240312108.

The previous prime is 240312103. The next prime is 240312139. The reversal of 240312109 is 901213042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231131209 + 9180900 = 15203^2 + 3030^2 .

It is a cyclic number.

It is not a de Polignac number, because 240312109 - 2¹⁵ = 240279341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240312109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240312103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120156054 + 120156055.

It is an arithmetic number, because the mean of its divisors is an integer number (120156055).

Almost surely, 2^240312109 is an apocalyptic number.

It is an amenable number.

240312109 is a deficient number, since it is larger than the sum of its proper divisors (1).

240312109 is an equidigital number, since it uses as much as digits as its factorization.

240312109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 240312109 is about 15502.0033866594. The cubic root of 240312109 is about 621.7157720636.

The spelling of 240312109 in words is "two hundred forty million, three hundred twelve thousand, one hundred nine".