648419 has 4 divisors (see below), whose sum is σ = 650496. Its totient is φ = 646344.

The previous prime is 648391. The next prime is 648433. The reversal of 648419 is 914846.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648419 is a prime.

It is a super-2 number, since 2×648419² = 840894399122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648449) 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, 464 + ... + 1229.

It is an arithmetic number, because the mean of its divisors is an integer number (162624).

2⁶⁴⁸⁴¹⁹ is an apocalyptic number.

648419 is a deficient number, since it is larger than the sum of its proper divisors (2077).

648419 is a wasteful number, since it uses less digits than its factorization.

648419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076.

The product of its digits is 6912, while the sum is 32.

The square root of 648419 is about 805.2446833106. The cubic root of 648419 is about 86.5536215138.

The spelling of 648419 in words is "six hundred forty-eight thousand, four hundred nineteen".