647400653 has 2 divisors, whose sum is σ = 647400654. Its totient is φ = 647400652.

The previous prime is 647400631. The next prime is 647400667. The reversal of 647400653 is 356004746.

647400653 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., 522899689 + 124500964 = 22867^2 + 11158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647400653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647400673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323700326 + 323700327.

It is an arithmetic number, because the mean of its divisors is an integer number (323700327).

Almost surely, 2^647400653 is an apocalyptic number.

It is an amenable number.

647400653 is a deficient number, since it is larger than the sum of its proper divisors (1).

647400653 is an equidigital number, since it uses as much as digits as its factorization.

647400653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 647400653 is about 25444.0691124671. The cubic root of 647400653 is about 865.0828673102.

The spelling of 647400653 in words is "six hundred forty-seven million, four hundred thousand, six hundred fifty-three".