648199 has 2 divisors, whose sum is σ = 648200. Its totient is φ = 648198.

The previous prime is 648191. The next prime is 648211. The reversal of 648199 is 991846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648199 - 2³ = 648191 is a prime.

648199 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324099 + 324100.

It is an arithmetic number, because the mean of its divisors is an integer number (324100).

2⁶⁴⁸¹⁹⁹ is an apocalyptic number.

648199 is a deficient number, since it is larger than the sum of its proper divisors (1).

648199 is an equidigital number, since it uses as much as digits as its factorization.

648199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 648199 is about 805.1080672804. The cubic root of 648199 is about 86.5438315731.

It can be divided in two parts, 6 and 48199, that added together give a triangular number (48205 = T₃₁₀).

The spelling of 648199 in words is "six hundred forty-eight thousand, one hundred ninety-nine".