648672533 has 2 divisors, whose sum is σ = 648672534. Its totient is φ = 648672532.

The previous prime is 648672511. The next prime is 648672581. The reversal of 648672533 is 335276846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 587238289 + 61434244 = 24233^2 + 7838^2 .

It is a cyclic number.

It is not a de Polignac number, because 648672533 - 2⁶ = 648672469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648672503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324336266 + 324336267.

It is an arithmetic number, because the mean of its divisors is an integer number (324336267).

Almost surely, 2^648672533 is an apocalyptic number.

It is an amenable number.

648672533 is a deficient number, since it is larger than the sum of its proper divisors (1).

648672533 is an equidigital number, since it uses as much as digits as its factorization.

648672533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 44.

The square root of 648672533 is about 25469.0504927058. The cubic root of 648672533 is about 865.6490091791.

The spelling of 648672533 in words is "six hundred forty-eight million, six hundred seventy-two thousand, five hundred thirty-three".