648882077 has 2 divisors, whose sum is σ = 648882078. Its totient is φ = 648882076.

The previous prime is 648882067. The next prime is 648882079. The reversal of 648882077 is 770288846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339333241 + 309548836 = 18421^2 + 17594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648882077 is a prime.

Together with 648882079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648882079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324441038 + 324441039.

It is an arithmetic number, because the mean of its divisors is an integer number (324441039).

Almost surely, 2^648882077 is an apocalyptic number.

It is an amenable number.

648882077 is a deficient number, since it is larger than the sum of its proper divisors (1).

648882077 is an equidigital number, since it uses as much as digits as its factorization.

648882077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1204224, while the sum is 50.

The square root of 648882077 is about 25473.1638592461. The cubic root of 648882077 is about 865.7422108170.

The spelling of 648882077 in words is "six hundred forty-eight million, eight hundred eighty-two thousand, seventy-seven".