648306787 has 2 divisors, whose sum is σ = 648306788. Its totient is φ = 648306786.

The previous prime is 648306761. The next prime is 648306811. The reversal of 648306787 is 787603846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648306787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648306787.

It is not a weakly prime, because it can be changed into another prime (648306707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324153393 + 324153394.

It is an arithmetic number, because the mean of its divisors is an integer number (324153394).

Almost surely, 2^648306787 is an apocalyptic number.

648306787 is a deficient number, since it is larger than the sum of its proper divisors (1).

648306787 is an equidigital number, since it uses as much as digits as its factorization.

648306787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 648306787 is about 25461.8692754479. The cubic root of 648306787 is about 865.4862834225.

It can be divided in two parts, 64830 and 6787, that added together give a palindrome (71617).

The spelling of 648306787 in words is "six hundred forty-eight million, three hundred six thousand, seven hundred eighty-seven".