6400717 has 2 divisors, whose sum is σ = 6400718. Its totient is φ = 6400716.

The previous prime is 6400697. The next prime is 6400753. The reversal of 6400717 is 7170046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5080516 + 1320201 = 2254^2 + 1149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6400717 is a prime.

It is a super-2 number, since 2×6400717² = 81938356228178, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6400691 and 6400700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6400117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200358 + 3200359.

It is an arithmetic number, because the mean of its divisors is an integer number (3200359).

Almost surely, 2^6400717 is an apocalyptic number.

It is an amenable number.

6400717 is a deficient number, since it is larger than the sum of its proper divisors (1).

6400717 is an equidigital number, since it uses as much as digits as its factorization.

6400717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 6400717 is about 2529.9638337336. The cubic root of 6400717 is about 185.6704864589.

It can be divided in two parts, 6400 and 717, that added together give a palindrome (7117).

The spelling of 6400717 in words is "six million, four hundred thousand, seven hundred seventeen".