717382649 has 2 divisors, whose sum is σ = 717382650. Its totient is φ = 717382648.

The previous prime is 717382637. The next prime is 717382663. The reversal of 717382649 is 946283717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 489825424 + 227557225 = 22132^2 + 15085^2 .

It is a cyclic number.

It is not a de Polignac number, because 717382649 - 2¹² = 717378553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (717382669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358691324 + 358691325.

It is an arithmetic number, because the mean of its divisors is an integer number (358691325).

Almost surely, 2^717382649 is an apocalyptic number.

It is an amenable number.

717382649 is a deficient number, since it is larger than the sum of its proper divisors (1).

717382649 is an equidigital number, since it uses as much as digits as its factorization.

717382649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The square root of 717382649 is about 26783.9998693250. Note that the first 3 decimals coincide. The cubic root of 717382649 is about 895.1935742260.

The spelling of 717382649 in words is "seven hundred seventeen million, three hundred eighty-two thousand, six hundred forty-nine".