648538333 has 2 divisors, whose sum is σ = 648538334. Its totient is φ = 648538332.

The previous prime is 648538309. The next prime is 648538349. The reversal of 648538333 is 333835846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481275844 + 167262489 = 21938^2 + 12933^2 .

It is a cyclic number.

It is not a de Polignac number, because 648538333 - 2¹⁷ = 648407261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648538333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648538393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324269166 + 324269167.

It is an arithmetic number, because the mean of its divisors is an integer number (324269167).

Almost surely, 2^648538333 is an apocalyptic number.

It is an amenable number.

648538333 is a deficient number, since it is larger than the sum of its proper divisors (1).

648538333 is an equidigital number, since it uses as much as digits as its factorization.

648538333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 43.

The square root of 648538333 is about 25466.4157862861. The cubic root of 648538333 is about 865.5893087379.

The spelling of 648538333 in words is "six hundred forty-eight million, five hundred thirty-eight thousand, three hundred thirty-three".