4240399217 has 2 divisors, whose sum is σ = 4240399218. Its totient is φ = 4240399216.

The previous prime is 4240399187. The next prime is 4240399259. The reversal of 4240399217 is 7129930424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3780897121 + 459502096 = 61489^2 + 21436^2 .

It is a cyclic number.

It is not a de Polignac number, because 4240399217 - 2⁶ = 4240399153 is a prime.

It is not a weakly prime, because it can be changed into another prime (4240399277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2120199608 + 2120199609.

It is an arithmetic number, because the mean of its divisors is an integer number (2120199609).

Almost surely, 2^4240399217 is an apocalyptic number.

It is an amenable number.

4240399217 is a deficient number, since it is larger than the sum of its proper divisors (1).

4240399217 is an equidigital number, since it uses as much as digits as its factorization.

4240399217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 4240399217 is about 65118.3477754158. The cubic root of 4240399217 is about 1618.5852629979.

The spelling of 4240399217 in words is "four billion, two hundred forty million, three hundred ninety-nine thousand, two hundred seventeen".