648226573 has 2 divisors, whose sum is σ = 648226574. Its totient is φ = 648226572.

The previous prime is 648226561. The next prime is 648226613. The reversal of 648226573 is 375622846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 607228164 + 40998409 = 24642^2 + 6403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648226573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648226373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324113286 + 324113287.

It is an arithmetic number, because the mean of its divisors is an integer number (324113287).

Almost surely, 2^648226573 is an apocalyptic number.

It is an amenable number.

648226573 is a deficient number, since it is larger than the sum of its proper divisors (1).

648226573 is an equidigital number, since it uses as much as digits as its factorization.

648226573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 43.

The square root of 648226573 is about 25460.2940477914. The cubic root of 648226573 is about 865.4505868553.

The spelling of 648226573 in words is "six hundred forty-eight million, two hundred twenty-six thousand, five hundred seventy-three".