663793 has 4 divisors (see below), whose sum is σ = 714868. Its totient is φ = 612720.

The previous prime is 663787. The next prime is 663797. The reversal of 663793 is 397366.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42849 + 620944 = 207^2 + 788^2 .

It is a cyclic number.

It is not a de Polignac number, because 663793 - 2⁹ = 663281 is a prime.

It is a super-2 number, since 2×663793² = 881242293698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663797) 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, 25518 + ... + 25543.

It is an arithmetic number, because the mean of its divisors is an integer number (178717).

2⁶⁶³⁷⁹³ is an apocalyptic number.

It is an amenable number.

663793 is a deficient number, since it is larger than the sum of its proper divisors (51075).

663793 is a wasteful number, since it uses less digits than its factorization.

663793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51074.

The product of its digits is 20412, while the sum is 34.

The square root of 663793 is about 814.7349262183. The cubic root of 663793 is about 87.2323467376.

The spelling of 663793 in words is "six hundred sixty-three thousand, seven hundred ninety-three".