648867 has 4 divisors (see below), whose sum is σ = 865160. Its totient is φ = 432576.

The previous prime is 648863. The next prime is 648871. The reversal of 648867 is 768846.

648867 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (648863) and next prime (648871).

It is not a de Polignac number, because 648867 - 2² = 648863 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

648867 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648867.

It is not an unprimeable number, because it can be changed into a prime (648863) 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 in 3 ways as a sum of consecutive naturals, for example, 108142 + ... + 108147.

It is an arithmetic number, because the mean of its divisors is an integer number (216290).

2⁶⁴⁸⁸⁶⁷ is an apocalyptic number.

648867 is a deficient number, since it is larger than the sum of its proper divisors (216293).

648867 is a wasteful number, since it uses less digits than its factorization.

648867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216292.

The product of its digits is 64512, while the sum is 39.

The square root of 648867 is about 805.5228115951. The cubic root of 648867 is about 86.5735505492.

It can be divided in two parts, 6488 and 67, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 648867 in words is "six hundred forty-eight thousand, eight hundred sixty-seven".