663743 has 4 divisors (see below), whose sum is σ = 681720. Its totient is φ = 645768.

The previous prime is 663737. The next prime is 663763. The reversal of 663743 is 347366.

663743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 347366 = 2 ⋅173683.

It is a cyclic number.

It is not a de Polignac number, because 663743 - 2¹⁰ = 662719 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 (663713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8933 + ... + 9006.

It is an arithmetic number, because the mean of its divisors is an integer number (170430).

2⁶⁶³⁷⁴³ is an apocalyptic number.

663743 is a deficient number, since it is larger than the sum of its proper divisors (17977).

663743 is a wasteful number, since it uses less digits than its factorization.

663743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17976.

The product of its digits is 9072, while the sum is 29.

The square root of 663743 is about 814.7042408138. The cubic root of 663743 is about 87.2301564328.

The spelling of 663743 in words is "six hundred sixty-three thousand, seven hundred forty-three".