647341697 has 2 divisors, whose sum is σ = 647341698. Its totient is φ = 647341696.

The previous prime is 647341663. The next prime is 647341703. The reversal of 647341697 is 796143746.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 483604081 + 163737616 = 21991^2 + 12796^2 .

It is a cyclic number.

It is not a de Polignac number, because 647341697 - 2⁶ = 647341633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (647341897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323670848 + 323670849.

It is an arithmetic number, because the mean of its divisors is an integer number (323670849).

Almost surely, 2^647341697 is an apocalyptic number.

It is an amenable number.

647341697 is a deficient number, since it is larger than the sum of its proper divisors (1).

647341697 is an equidigital number, since it uses as much as digits as its factorization.

647341697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 47.

The square root of 647341697 is about 25442.9105449829. The cubic root of 647341697 is about 865.0566067179.

The spelling of 647341697 in words is "six hundred forty-seven million, three hundred forty-one thousand, six hundred ninety-seven".