1316663 has 4 divisors (see below), whose sum is σ = 1359168. Its totient is φ = 1274160.

The previous prime is 1316657. The next prime is 1316669. The reversal of 1316663 is 3666131.

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 (1316657) and next prime (1316669).

It is a cyclic number.

It is not a de Polignac number, because 1316663 - 2⁴ = 1316647 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 (1316669) 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, 21206 + ... + 21267.

It is an arithmetic number, because the mean of its divisors is an integer number (339792).

2^1316663 is an apocalyptic number.

1316663 is a deficient number, since it is larger than the sum of its proper divisors (42505).

1316663 is an equidigital number, since it uses as much as digits as its factorization.

1316663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42504.

The product of its digits is 1944, while the sum is 26.

The square root of 1316663 is about 1147.4593674723. The cubic root of 1316663 is about 109.6036146623.

The spelling of 1316663 in words is "one million, three hundred sixteen thousand, six hundred sixty-three".