648015677 has 2 divisors, whose sum is σ = 648015678. Its totient is φ = 648015676.

The previous prime is 648015659. The next prime is 648015679. The reversal of 648015677 is 776510846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 647906116 + 109561 = 25454^2 + 331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648015677 is a prime.

Together with 648015679, 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 (648015679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324007838 + 324007839.

It is an arithmetic number, because the mean of its divisors is an integer number (324007839).

Almost surely, 2^648015677 is an apocalyptic number.

It is an amenable number.

648015677 is a deficient number, since it is larger than the sum of its proper divisors (1).

648015677 is an equidigital number, since it uses as much as digits as its factorization.

648015677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 648015677 is about 25456.1520462147. The cubic root of 648015677 is about 865.3567205685.

The spelling of 648015677 in words is "six hundred forty-eight million, fifteen thousand, six hundred seventy-seven".