648858901 has 2 divisors, whose sum is σ = 648858902. Its totient is φ = 648858900.

The previous prime is 648858871. The next prime is 648858937. The reversal of 648858901 is 109858846.

648858901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 645210801 + 3648100 = 25401^2 + 1910^2 .

It is a cyclic number.

It is not a de Polignac number, because 648858901 - 2¹¹ = 648856853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648852901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324429450 + 324429451.

It is an arithmetic number, because the mean of its divisors is an integer number (324429451).

Almost surely, 2^648858901 is an apocalyptic number.

It is an amenable number.

648858901 is a deficient number, since it is larger than the sum of its proper divisors (1).

648858901 is an equidigital number, since it uses as much as digits as its factorization.

648858901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 49.

The square root of 648858901 is about 25472.7089450651. The cubic root of 648858901 is about 865.7319035100.

The spelling of 648858901 in words is "six hundred forty-eight million, eight hundred fifty-eight thousand, nine hundred one".