648858787 has 2 divisors, whose sum is σ = 648858788. Its totient is φ = 648858786.

The previous prime is 648858779. The next prime is 648858871. The reversal of 648858787 is 787858846.

648858787 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 is a cyclic number.

It is not a de Polignac number, because 648858787 - 2³ = 648858779 is a prime.

It is a super-2 number, since 2×648858787² = 842035450934222738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (648858757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324429393 + 324429394.

It is an arithmetic number, because the mean of its divisors is an integer number (324429394).

Almost surely, 2^648858787 is an apocalyptic number.

648858787 is a deficient number, since it is larger than the sum of its proper divisors (1).

648858787 is an equidigital number, since it uses as much as digits as its factorization.

648858787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24084480, while the sum is 61.

The square root of 648858787 is about 25472.7067073760. The cubic root of 648858787 is about 865.7318528089.

The spelling of 648858787 in words is "six hundred forty-eight million, eight hundred fifty-eight thousand, seven hundred eighty-seven".