647267653 has 2 divisors, whose sum is σ = 647267654. Its totient is φ = 647267652.

The previous prime is 647267627. The next prime is 647267659. The reversal of 647267653 is 356762746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 593068609 + 54199044 = 24353^2 + 7362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647267653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647267659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323633826 + 323633827.

It is an arithmetic number, because the mean of its divisors is an integer number (323633827).

Almost surely, 2^647267653 is an apocalyptic number.

It is an amenable number.

647267653 is a deficient number, since it is larger than the sum of its proper divisors (1).

647267653 is an equidigital number, since it uses as much as digits as its factorization.

647267653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 46.

The square root of 647267653 is about 25441.4554025512. The cubic root of 647267653 is about 865.0236232648.

The spelling of 647267653 in words is "six hundred forty-seven million, two hundred sixty-seven thousand, six hundred fifty-three".