2006398717 has 2 divisors, whose sum is σ = 2006398718. Its totient is φ = 2006398716.

The previous prime is 2006398711. The next prime is 2006398753. The reversal of 2006398717 is 7178936002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1818681316 + 187717401 = 42646^2 + 13701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2006398717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2006398711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1003199358 + 1003199359.

It is an arithmetic number, because the mean of its divisors is an integer number (1003199359).

Almost surely, 2^2006398717 is an apocalyptic number.

It is an amenable number.

2006398717 is a deficient number, since it is larger than the sum of its proper divisors (1).

2006398717 is an equidigital number, since it uses as much as digits as its factorization.

2006398717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 2006398717 is about 44792.8422518598. The cubic root of 2006398717 is about 1261.2632658743.

The spelling of 2006398717 in words is "two billion, six million, three hundred ninety-eight thousand, seven hundred seventeen".