648671 has 2 divisors, whose sum is σ = 648672. Its totient is φ = 648670.

The previous prime is 648653. The next prime is 648677. The reversal of 648671 is 176846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648671 - 2⁶ = 648607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324335 + 324336.

It is an arithmetic number, because the mean of its divisors is an integer number (324336).

2⁶⁴⁸⁶⁷¹ is an apocalyptic number.

648671 is a deficient number, since it is larger than the sum of its proper divisors (1).

648671 is an equidigital number, since it uses as much as digits as its factorization.

648671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 648671 is about 805.4011422887. The cubic root of 648671 is about 86.5648327253.

The spelling of 648671 in words is "six hundred forty-eight thousand, six hundred seventy-one".