648743 has 4 divisors (see below), whose sum is σ = 664608. Its totient is φ = 632880.

The previous prime is 648731. The next prime is 648763. The reversal of 648743 is 347846.

648743 = T₁₅₇ + T₁₅₈ + ... + T₁₉₇.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 347846 = 2 ⋅173923.

It is a cyclic number.

It is not a de Polignac number, because 648743 - 2¹⁰ = 647719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648763) 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, 7871 + ... + 7952.

It is an arithmetic number, because the mean of its divisors is an integer number (166152).

2⁶⁴⁸⁷⁴³ is an apocalyptic number.

648743 is a deficient number, since it is larger than the sum of its proper divisors (15865).

648743 is a wasteful number, since it uses less digits than its factorization.

648743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15864.

The product of its digits is 16128, while the sum is 32.

The square root of 648743 is about 805.4458392716. The cubic root of 648743 is about 86.5680353952.

The spelling of 648743 in words is "six hundred forty-eight thousand, seven hundred forty-three".