647455453 has 2 divisors, whose sum is σ = 647455454. Its totient is φ = 647455452.

The previous prime is 647455433. The next prime is 647455463. The reversal of 647455453 is 354554746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 647091844 + 363609 = 25438^2 + 603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647455453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647455433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323727726 + 323727727.

It is an arithmetic number, because the mean of its divisors is an integer number (323727727).

Almost surely, 2^647455453 is an apocalyptic number.

It is an amenable number.

647455453 is a deficient number, since it is larger than the sum of its proper divisors (1).

647455453 is an equidigital number, since it uses as much as digits as its factorization.

647455453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008000, while the sum is 43.

The square root of 647455453 is about 25445.1459614599. The cubic root of 647455453 is about 865.1072752784.

The spelling of 647455453 in words is "six hundred forty-seven million, four hundred fifty-five thousand, four hundred fifty-three".