1317663 has 6 divisors (see below), whose sum is σ = 1903304. Its totient is φ = 878436.

The previous prime is 1317629. The next prime is 1317671. The reversal of 1317663 is 3667131.

It is not a de Polignac number, because 1317663 - 2⁶ = 1317599 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 (1317683) 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 5 ways as a sum of consecutive naturals, for example, 73195 + ... + 73212.

2^1317663 is an apocalyptic number.

1317663 is a deficient number, since it is larger than the sum of its proper divisors (585641).

1317663 is a wasteful number, since it uses less digits than its factorization.

1317663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146413 (or 146410 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 1317663 is about 1147.8950300441. The cubic root of 1317663 is about 109.6313554682.

It can be divided in two parts, 131766 and 3, that added together give a square (131769 = 363²).

The spelling of 1317663 in words is "one million, three hundred seventeen thousand, six hundred sixty-three".