648787847 has 16 divisors (see below), whose sum is σ = 698533632. Its totient is φ = 600378240.

The previous prime is 648787837. The next prime is 648787877. The reversal of 648787847 is 748787846.

It is a cyclic number.

It is not a de Polignac number, because 648787847 - 2⁴ = 648787831 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 (648787817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823988 + ... + 824774.

It is an arithmetic number, because the mean of its divisors is an integer number (43658352).

Almost surely, 2^648787847 is an apocalyptic number.

648787847 is a deficient number, since it is larger than the sum of its proper divisors (49745785).

648787847 is a wasteful number, since it uses less digits than its factorization.

648787847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558.

The product of its digits is 16859136, while the sum is 59.

The square root of 648787847 is about 25471.3141985254. The cubic root of 648787847 is about 865.7003013850.

Subtracting 648787847 from its reverse (748787846), we obtain a palindrome (99999999).

The spelling of 648787847 in words is "six hundred forty-eight million, seven hundred eighty-seven thousand, eight hundred forty-seven".