648858887 has 4 divisors (see below), whose sum is σ = 658543416. Its totient is φ = 639174360.

The previous prime is 648858871. The next prime is 648858901. The reversal of 648858887 is 788858846.

It is a happy number.

648858887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788858846 = 2 ⋅394429423.

It is a cyclic number.

It is not a de Polignac number, because 648858887 - 2⁴ = 648858871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648858187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4842164 + ... + 4842297.

It is an arithmetic number, because the mean of its divisors is an integer number (164635854).

Almost surely, 2^648858887 is an apocalyptic number.

648858887 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

648858887 is a deficient number, since it is larger than the sum of its proper divisors (9684529).

648858887 is an equidigital number, since it uses as much as digits as its factorization.

648858887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9684528.

The product of its digits is 27525120, while the sum is 62.

The square root of 648858887 is about 25472.7086702612. The cubic root of 648858887 is about 865.7318972835.

The spelling of 648858887 in words is "six hundred forty-eight million, eight hundred fifty-eight thousand, eight hundred eighty-seven".