647920927097 has 2 divisors, whose sum is σ = 647920927098. Its totient is φ = 647920927096.

The previous prime is 647920927061. The next prime is 647920927103. The reversal of 647920927097 is 790729029746.

647920927097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 625295051536 + 22625875561 = 790756^2 + 150419^2 .

It is a cyclic number.

It is not a de Polignac number, because 647920927097 - 2¹⁰ = 647920926073 is a prime.

It is not a weakly prime, because it can be changed into another prime (647920947097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323960463548 + 323960463549.

It is an arithmetic number, because the mean of its divisors is an integer number (323960463549).

Almost surely, 2^647920927097 is an apocalyptic number.

It is an amenable number.

647920927097 is a deficient number, since it is larger than the sum of its proper divisors (1).

647920927097 is an equidigital number, since it uses as much as digits as its factorization.

647920927097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24004512, while the sum is 62.

The spelling of 647920927097 in words is "six hundred forty-seven billion, nine hundred twenty million, nine hundred twenty-seven thousand, ninety-seven".