648859 has 2 divisors, whose sum is σ = 648860. Its totient is φ = 648858.

The previous prime is 648841. The next prime is 648863. The reversal of 648859 is 958846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648859 - 2⁷ = 648731 is a prime.

It is not a weakly prime, because it can be changed into another prime (648889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324429 + 324430.

It is an arithmetic number, because the mean of its divisors is an integer number (324430).

2⁶⁴⁸⁸⁵⁹ is an apocalyptic number.

648859 is a deficient number, since it is larger than the sum of its proper divisors (1).

648859 is an equidigital number, since it uses as much as digits as its factorization.

648859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 648859 is about 805.5178458607. The cubic root of 648859 is about 86.5731947540.

The spelling of 648859 in words is "six hundred forty-eight thousand, eight hundred fifty-nine".