663197 has 4 divisors (see below), whose sum is σ = 669180. Its totient is φ = 657216.

The previous prime is 663191. The next prime is 663203. The reversal of 663197 is 791366.

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 (663191) and next prime (663203).

It can be written as a sum of positive squares in 2 ways, for example, as 32761 + 630436 = 181^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 663197 - 2⁸ = 662941 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 (663191) 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, 2822 + ... + 3047.

It is an arithmetic number, because the mean of its divisors is an integer number (167295).

2⁶⁶³¹⁹⁷ is an apocalyptic number.

It is an amenable number.

663197 is a deficient number, since it is larger than the sum of its proper divisors (5983).

663197 is a wasteful number, since it uses less digits than its factorization.

663197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5982.

The product of its digits is 6804, while the sum is 32.

The square root of 663197 is about 814.3690809455. The cubic root of 663197 is about 87.2062311430.

The spelling of 663197 in words is "six hundred sixty-three thousand, one hundred ninety-seven".