647893097 has 2 divisors, whose sum is σ = 647893098. Its totient is φ = 647893096.

The previous prime is 647893093. The next prime is 647893121. The reversal of 647893097 is 790398746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441798361 + 206094736 = 21019^2 + 14356^2 .

It is a cyclic number.

It is not a de Polignac number, because 647893097 - 2² = 647893093 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (647893091) 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, 323946548 + 323946549.

It is an arithmetic number, because the mean of its divisors is an integer number (323946549).

Almost surely, 2^647893097 is an apocalyptic number.

It is an amenable number.

647893097 is a deficient number, since it is larger than the sum of its proper divisors (1).

647893097 is an equidigital number, since it uses as much as digits as its factorization.

647893097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 647893097 is about 25453.7442628781. The cubic root of 647893097 is about 865.3021528989.

The spelling of 647893097 in words is "six hundred forty-seven million, eight hundred ninety-three thousand, ninety-seven".