648377 has 2 divisors, whose sum is σ = 648378. Its totient is φ = 648376.

The previous prime is 648371. The next prime is 648379. The reversal of 648377 is 773846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 609961 + 38416 = 781^2 + 196^2 .

It is a cyclic number.

It is not a de Polignac number, because 648377 - 2¹⁴ = 631993 is a prime.

Together with 648379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (648371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324188 + 324189.

It is an arithmetic number, because the mean of its divisors is an integer number (324189).

2⁶⁴⁸³⁷⁷ is an apocalyptic number.

It is an amenable number.

648377 is a deficient number, since it is larger than the sum of its proper divisors (1).

648377 is an equidigital number, since it uses as much as digits as its factorization.

648377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 648377 is about 805.2186038586. The cubic root of 648377 is about 86.5517526961.

The spelling of 648377 in words is "six hundred forty-eight thousand, three hundred seventy-seven".