648605847 has 4 divisors (see below), whose sum is σ = 864807800. Its totient is φ = 432403896.

The previous prime is 648605833. The next prime is 648605857. The reversal of 648605847 is 748506846.

648605847 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.

It is a de Polignac number, because none of the positive numbers 2^k-648605847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 648605796 and 648605805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648605857) 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, 108100972 + ... + 108100977.

It is an arithmetic number, because the mean of its divisors is an integer number (216201950).

Almost surely, 2^648605847 is an apocalyptic number.

648605847 is a deficient number, since it is larger than the sum of its proper divisors (216201953).

648605847 is a wasteful number, since it uses less digits than its factorization.

648605847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216201952.

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 648605847 is about 25467.7413014975. The cubic root of 648605847 is about 865.6193441606.

Subtracting 648605847 from its reverse (748506846), we obtain a palindrome (99900999).

It can be divided in two parts, 64860 and 5847, that added together give a palindrome (70707).

The spelling of 648605847 in words is "six hundred forty-eight million, six hundred five thousand, eight hundred forty-seven".