648727847 has 2 divisors, whose sum is σ = 648727848. Its totient is φ = 648727846.

The previous prime is 648727843. The next prime is 648727867. The reversal of 648727847 is 748727846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648727847 - 2² = 648727843 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648727841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324363923 + 324363924.

It is an arithmetic number, because the mean of its divisors is an integer number (324363924).

Almost surely, 2^648727847 is an apocalyptic number.

648727847 is a deficient number, since it is larger than the sum of its proper divisors (1).

648727847 is an equidigital number, since it uses as much as digits as its factorization.

648727847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4214784, while the sum is 53.

The square root of 648727847 is about 25470.1363757637. The cubic root of 648727847 is about 865.6736138632.

Subtracting 648727847 from its reverse (748727846), we obtain a palindrome (99999999).

The spelling of 648727847 in words is "six hundred forty-eight million, seven hundred twenty-seven thousand, eight hundred forty-seven".